UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 14A

                Proxy Statement Pursuant to Section 14(a) of the
                         Securities Exchange Act of 1934

Filed by Registrant:                        [ X ]
Filed by a Party other than the Registrant: [   ]

Check the appropriate box:

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         14a-6(e)(2))
[ X ]    Definitive Proxy Statement
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[   ]    Soliciting Material Pursuant to Section 240.14a-12

                             Kronos Worldwide, Inc.
- -----------------------------------------------------------------------------
                (Name of Registrant as Specified in Its Charter)

- -----------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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                             Kronos Worldwide, Inc.
                              Three Lincoln Centre
                          5430 LBJ Freeway, Suite 1700
                            Dallas, Texas 75240-2697



                                 April 13, 2006





To our Stockholders:

     You are cordially invited to attend the 2006 Annual Meeting of Stockholders
of Kronos  Worldwide,  Inc.,  which will be held on Wednesday,  May 24, 2006, at
10:00 a.m., local time, at our corporate  offices at Three Lincoln Centre,  5430
LBJ  Freeway,  Suite 1700,  Dallas,  Texas.  The matters to be acted upon at the
meeting are described in the attached  Notice of Annual Meeting of  Stockholders
and Proxy Statement.

     Whether or not you plan to attend the meeting, please complete,  date, sign
and  return  the  enclosed  proxy  card  or  voting   instruction  form  in  the
accompanying  envelope  as  promptly  as possible to ensure that your shares are
represented and voted in accordance with your wishes.

                                               Sincerely,


                                               Harold C. Simmons
                                               Chairman of the Board and
                                               Chief Executive Officer






                             Kronos Worldwide, Inc.
                              Three Lincoln Centre
                          5430 LBJ Freeway, Suite 1700
                            Dallas, Texas 75240-2697

                    NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

                             To Be Held May 24, 2006




To the Stockholders of Kronos Worldwide, Inc.:

     The 2006 Annual Meeting of Stockholders of Kronos  Worldwide,  Inc. will be
held on  Wednesday,  May 24, 2006,  at 10:00 a.m.,  local time, at our corporate
offices at Three Lincoln Centre,  5430 LBJ Freeway,  Suite 1700, Dallas,  Texas,
for the following purposes:

     (1)  To elect seven  directors  to serve  until the 2007 Annual  Meeting of
          Stockholders; and

     (2)  To  transact  such other  business  as may  properly  come  before the
          meeting or any adjournment or postponement thereof.

     The close of business on March 28, 2006 has been set as the record date for
the  meeting.  Only  holders of our common stock at the close of business on the
record date are entitled to notice of, and to vote at, the  meeting.  A complete
list of  stockholders  entitled to vote at the  meeting  will be  available  for
examination  during  normal  business  hours  by any of  our  stockholders,  for
purposes  related to the meeting,  for a period of ten days prior to the meeting
at our corporate offices.

     You are cordially invited to attend the meeting. Whether or not you plan to
attend the meeting,  please complete,  date and sign the accompanying proxy card
or voting instruction form and return it promptly in the enclosed  envelope.  If
you  choose,  you may still  vote in  person  at the  meeting  even  though  you
previously submitted your proxy card.

                                  By Order of the Board of Directors,


                                  Robert D. Graham
                                  Vice President, General Counsel and Secretary

Dallas, Texas
April 13, 2006



                                TABLE OF CONTENTS


                                                                                   Page
                                                                                 
TABLE OF CONTENTS.....................................................................i
GLOSSARY OF TERMS....................................................................ii
GENERAL INFORMATION...................................................................1
QUESTIONS AND ANSWERS ABOUT THE ANNUAL MEETING........................................1
CONTROLLED COMPANY....................................................................3
ELECTION OF DIRECTORS.................................................................4
         Nominees for Director........................................................4
MEETINGS AND COMMITTEES OF THE BOARD OF DIRECTORS.....................................6
         Audit Committee..............................................................6
         Management Development and Compensation Committee............................6
EXECUTIVE OFFICERS....................................................................7
SECURITY OWNERSHIP....................................................................8
         Ownership of Kronos Worldwide................................................8
         Ownership of Related Companies..............................................11
COMPENSATION OF DIRECTORS AND EXECUTIVE OFFICERS AND OTHER INFORMATION...............13
         Compensation of Directors...................................................13
         Intercorporate Services Agreements..........................................13
         Summary of Cash and Certain Other Compensation of Executive Officers........14
         No Grants of Stock Options or Stock Appreciation Rights.....................15
         Stock Option Exercises and Holdings.........................................16
         Pension Plans...............................................................16
         Chief Operations Management Consultant......................................17
EQUITY COMPENSATION PLAN INFORMATION.................................................18
CORPORATE GOVERNANCE DOCUMENTS.......................................................18
         Code of Business Conduct and Ethics.........................................18
         Corporate Governance Guidelines.............................................18
         Audit Committee Charter.....................................................18
SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE..............................18
EXECUTIVE COMPENSATION REPORT........................................................19
CERTAIN RELATIONSHIPS AND TRANSACTIONS...............................................22
         Relationships with Related Parties..........................................22
         Intercorporate Services Agreements..........................................22
         Short-Swing Trading Profits.................................................23
         Loans between Related Parties...............................................23
         Insurance Matters...........................................................23
         Tax Matters.................................................................23
         Titanium Dioxide Purchases..................................................24
         Simmons Family Matters......................................................24
PERFORMANCE GRAPH....................................................................25
AUDIT COMMITTEE REPORT...............................................................26
INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM MATTERS................................27
         Independent Registered Public Accounting Firm...............................27
         Fees Paid to PricewaterhouseCoopers LLP.....................................27
         Preapproval Policies and Procedures.........................................27
OTHER MATTERS........................................................................28
STOCKHOLDER PROPOSALS AND DIRECTOR NOMINATIONS FOR THE 2007 ANNUAL MEETING...........28
COMMUNICATIONS WITH THE BOARD OF DIRECTORS...........................................29
2005 ANNUAL REPORT ON FORM 10-K......................................................29
ADDITIONAL COPIES....................................................................29
APPENDIX A - AMENDED AND RESTATED AUDIT COMMITTEE CHARTER...........................A-1




                                GLOSSARY OF TERMS



"CDCT No. 2" means the Contran Deferred Compensation Trust No. 2, an irrevocable
"rabbi trust"  established by Contran to assist it in meeting  certain  deferred
compensation obligations that it owes to Harold C. Simmons.

"CMRT" means The Combined Master Retirement Trust, a trust Contran sponsors that
permits the  collective  investment  by master  trusts that  maintain  assets of
certain employee benefit plans Contran and related entities adopt.

"Computershare" means Computershare Investor Services L.L.C., our stock transfer
agent.

"CompX"  means  CompX  International  Inc.,  one of  our  publicly  held  sister
corporations that manufactures precision slides, security products and ergonomic
computer support systems.

"Contran" means Contran Corporation,  the parent corporation of our consolidated
tax group.

"Dixie Holding" means Dixie Holding Company, one of our parent corporations.

"Dixie Rice" means Dixie Rice Agricultural Corporation,  Inc., one of our parent
corporations.

"Foundation"  means  the  Harold  C.  Simmons  Foundation,  Inc.,  a  tax-exempt
foundation organized for charitable purposes.

"independent  directors"  means the following  directors:  Cecil H. Moore,  Jr.,
Keith R. Coogan, George E. Poston and R. Gerald Turner.

"ISA"  means an  intercorporate  services  agreement  between  or among  Contran
related  companies  pursuant to which employees of one or more related companies
provide certain  services,  including  executive  officer  services,  to another
related company on a fee basis.

"Keystone"  means  Keystone  Consolidated  Industries,  Inc.,  one of our sister
corporations that manufactures  steel fabricated wire products,  industrial wire
and carbon steel rod.

"KII" means Kronos  International,  Inc.,  one of our wholly owned  subsidiaries
with operations in Germany.

"Kronos Worldwide," "us," "we" or "our" mean Kronos Worldwide, Inc.

"named  executive  officer"  means our executive  officers  named in the summary
compensation table in this proxy statement.

"National" means National City Lines, Inc., one of our parent corporations.

"NL" means NL  Industries,  Inc.,  one of our publicly held parent  corporations
that is a  diversified  holding  company with  principal  investments  in us and
CompX.

"NOA" means NOA, Inc., one of our parent corporations.

"non-management  directors" means the following directors who are not one of our
executive  officers:  Cecil H. Moore,  Jr.,  Keith R. Coogan,  George E. Poston,
Glenn R. Simmons and R. Gerald Turner.

"NYSE" means the New York Stock Exchange, Inc.

"PwC"  means  PricewaterhouseCoopers  LLP,  our  independent  registered  public
accounting firm.

"record date" means the close of business on March 28, 2006,  the date our board
of directors set for the determination of stockholders entitled to notice of and
to vote at the 2006 meeting of our stockholders.

"SEC" means the U.S. Securities and Exchange Commission.

"Securities Exchange Act" means the Securities Exchange Act of 1934, as amended.

"Southwest"  means  Southwest  Louisiana  Land Company,  Inc., one of our parent
corporations.

"Tall  Pines"  means Tall Pines  Insurance  Company,  an indirect  wholly  owned
captive insurance subsidiary of Valhi.

"TFMC" means TIMET  Finance  Management  Company,  a wholly owned  subsidiary of
TIMET.

"TIMET"  means  Titanium  Metals  Corporation,  one of our publicly  held sister
corporations that is an integrated producer of titanium metals products.

"TIMET  series A preferred  stock"  means  TIMET's 6 3/4%  Series A  Convertible
Preferred Stock, par value $0.01 per share.

"Tremont" means Tremont LLC, a wholly owned subsidiary of Valhi.

"Valhi" means Valhi, Inc., one of our publicly held parent  corporations that is
a diversified holding company with principal investments in NL, TIMET and us.

"VGI" means Valhi Group, Inc., one of our parent corporations.

"VHC" means Valhi Holding Company, one of our parent corporations.





                             Kronos Worldwide, Inc.
                              Three Lincoln Centre
                          5430 LBJ Freeway, Suite 1700
                            Dallas, Texas 75240-2697

                                 ---------------

                                 PROXY STATEMENT

                                 ---------------

                               GENERAL INFORMATION




     This proxy statement and the accompanying  proxy card or voting instruction
form are being furnished in connection  with the  solicitation of proxies by and
on  behalf of our  board of  directors  for use at our 2006  Annual  Meeting  of
Stockholders  to be held on Wednesday,  May 24, 2006 and at any  adjournment  or
postponement  of the  meeting.  The  accompanying  notice of annual  meeting  of
stockholders sets forth the time, place and purposes of the meeting. The notice,
this proxy statement, the accompanying proxy card or voting instruction form and
our Annual Report to Stockholders, which includes our Annual Report on Form 10-K
for the fiscal year ended  December 31, 2005, are first being mailed on or about
April 13,  2006 to the  holders of our common  stock at the close of business on
March 28, 2006.  Our  principal  executive  offices are located at Three Lincoln
Centre, 5430 LBJ Freeway, Suite 1700, Dallas, Texas 75240-2697.

     Please  refer to the  Glossary of Terms on page ii for the  definitions  of
capitalized or other terms used in this proxy statement.

                 QUESTIONS AND ANSWERS ABOUT THE ANNUAL MEETING

Q:   What is the purpose of the annual meeting?

A:   At the annual  meeting,  stockholders  will vote on the  election  of seven
     directors and any other matter that may properly come before the meeting.

Q:   How does the board recommend that I vote?

A:   The board of  directors  recommends  that you vote FOR each of the nominees
     for director.

Q:   Who is allowed to vote at the annual meeting?

A:   The board of  directors  has set the close of business on March 28, 2006 as
     the record date for the determination of stockholders entitled to notice of
     and to vote at the  meeting.  Only holders of record of our common stock as
     of the close of  business  on the record  date are  entitled to vote at the
     meeting.  On the record  date,  48,949,549  shares of our common stock were
     issued and  outstanding.  Each share of our common stock is entitled to one
     vote.

Q:   How do I vote?

A:   If your  shares  are held by a bank,  broker  or other  nominee  (i.e.,  in
     "street name"),  you must follow the instructions  from your nominee on how
     to vote your shares.

     If   you are a stockholder of record, you may:

     o    vote in person at the annual meeting; or

     o    instruct the agents named on the proxy card how to vote your shares by
          completing,  signing  and  mailing  the  enclosed  proxy  card  in the
          envelope provided.

     If you  execute a proxy  card but do not  indicate  how you would like your
     shares voted for one or more of the nominees,  the agents will vote FOR the
     election of each such  nominee for director  and, to the extent  allowed by
     applicable  law, in the  discretion  of the agents on any other matter that
     may properly come before the meeting.

Q:   Who will count the votes?

A:   The board of directors has appointed Computershare,  our transfer agent and
     registrar,  to receive proxies and ballots,  ascertain the number of shares
     represented,  tabulate  the vote and serve as inspector of election for the
     meeting.

Q:   May I change or revoke my proxy or voting instructions?

A:   If you are a  stockholder  of record,  you may change or revoke  your proxy
     instructions at any time before the meeting in any of the following ways:

     o    delivering to Computershare a written revocation;

     o    submitting another proxy card bearing a later date; or

     o    voting in person at the meeting.

     If your shares are held by a bank, broker or other nominee, you must follow
     the  instructions  from your nominee on how to change or revoke your voting
     instructions.

Q:   What constitutes a quorum?

A:   A quorum  is the  presence,  in person or by  proxy,  of the  holders  of a
     majority of the outstanding  shares of our common stock entitled to vote at
     the meeting. Under the applicable rules of the NYSE and the SEC, brokers or
     other  nominees  holding  shares of record on behalf of a client who is the
     actual  beneficial  owner of such shares are  authorized to vote on certain
     routine matters without receiving instructions from the beneficial owner of
     the shares.  If such a broker/nominee  who is entitled to vote on a routine
     matter  delivers  an  executed  proxy card and does not vote on the matter,
     such a vote is referred  to in this proxy  statement  as a  "broker/nominee
     non-vote."  Shares  of common  stock  that are  voted to  abstain  from any
     business  coming before the meeting and  broker/nominee  non-votes  will be
     counted as being in attendance  at the meeting for purposes of  determining
     whether a quorum is present.

Q:   What vote is  required  to elect a director  nominee  or approve  any other
     matter?

A:   If a quorum is present, a plurality of the affirmative votes of the holders
     of our  outstanding  shares of common stock  represented and entitled to be
     voted at the meeting is necessary to elect each nominee for  director.  The
     accompanying  proxy card or voting  instruction form provides space for you
     to withhold authority to vote for any of the nominees. Neither shares as to
     which the  authority to vote on the election of directors has been withheld
     nor broker/nominee  non-votes will be counted as affirmative votes to elect
     director nominees.  However,  since director nominees need only receive the
     plurality  of the  affirmative  votes  from  the  holders  represented  and
     entitled  to vote at the  meeting to be  elected,  a vote  withheld  from a
     particular nominee will not affect the election of such nominee.

     Except as applicable  laws may otherwise  provide,  if a quorum is present,
     the approval of any other matter that may properly  come before the meeting
     will  require  the  affirmative  votes of the  holders of a majority of the
     outstanding shares represented and entitled to vote at the meeting.  Shares
     of our  common  stock  that are voted to  abstain  from any other  business
     coming before the meeting and broker/nominee  non-votes will not be counted
     as votes for or against any such other matter.

Q:   Who will pay for the cost of soliciting the proxies?

A:   We will pay all expenses related to the solicitation, including charges for
     preparing, printing, assembling and distributing all materials delivered to
     stockholders.  In  addition to the  solicitation  by mail,  our  directors,
     officers  and regular  employees  may solicit  proxies by  telephone  or in
     person for which such persons will receive no additional  compensation.  We
     have retained The Altman  Group,  Inc. to aid in the  distribution  of this
     proxy statement and related materials at an estimated cost of $1,200.  Upon
     request,   we  will  reimburse  banking   institutions,   brokerage  firms,
     custodians,   trustees,  nominees  and  fiduciaries  for  their  reasonable
     out-of-pocket  expenses incurred in distributing proxy materials and voting
     instructions  to the  beneficial  owners  of our  common  stock  that  such
     entities hold of record.

                               CONTROLLED COMPANY

     Valhi and NL are the direct  holders of 59.0% and 35.8%,  respectively,  of
the  outstanding  shares of our common  stock as of the record  date.  Together,
Valhi and NL own 94.8% of the outstanding  shares of our common stock.  Valhi is
the direct holder of 83.1% of the outstanding  shares of NL common stock.  Valhi
and NL have each  indicated  their  intention to have their shares of our common
stock  represented  at the  meeting  and voted FOR the  election  of each of the
director nominees to our board of directors.  If Valhi alone attends the meeting
in person or by proxy and votes as  indicated,  the  meeting  will have a quorum
present  and the  stockholders  will  elect  all the  nominees  to the  board of
directors.

     Because  of the  ownership  of our  common  stock by Valhi  and NL,  we are
considered  a  controlled  company  under  the  listing  standards  of the NYSE.
Pursuant to the listing standards, a controlled company may choose not to have a
majority of  independent  directors,  independent  compensation,  nominating  or
corporate governance committees or charters for these committees. We have chosen
not to have an independent  nominating or corporate  governance  committee.  Our
board of directors believes that the full board of directors best represents the
interests of all of our  stockholders and that it is appropriate for all matters
that would be considered by a nominating or corporate governance committee to be
considered  and acted upon by the full  board of  directors.  Applying  the NYSE
director independence standards, the board of directors has determined that four
of our directors are independent and have no material relationship with us other
than serving as our directors.  While the members of our management  development
and compensation  committee  currently satisfy the independence  requirements of
the NYSE, we have chosen not to satisfy all of the NYSE listing  standards for a
compensation committee.  See "Meetings and Committees of the Board of Directors"
for more  information  on the  committees  of the board of  directors.  See also
"Stockholder Proposals and Director Nominations for the 2007 Annual Meeting" for
a description  of our policies and  procedures  for  stockholder  nominations of
directors.

                              ELECTION OF DIRECTORS

     Our bylaws  provide that the board of directors will consist of one or more
members as  determined by our board of directors or  stockholders.  The board of
directors  has  currently  set the number of directors at seven.  The  directors
elected  at the  meeting  will hold  office  until our 2007  Annual  Meeting  of
Stockholders  and until their successors are duly elected and qualified or their
earlier removal, resignation or death.

     All of the nominees are currently  members of our board of directors  whose
terms will expire at the meeting.  All of the  nominees  have agreed to serve if
elected. If any nominee is not available for election at the meeting, all shares
represented  by a proxy  card  will be  voted  FOR an  alternate  nominee  to be
selected by the board of directors,  unless the stockholder executing such proxy
card  withholds  authority  to vote for such  nominee.  The  board of  directors
believes  that all of its nominees will be available for election at the meeting
and will serve if elected.

     THE BOARD OF DIRECTORS  RECOMMENDS A VOTE FOR THE ELECTION OF THE FOLLOWING
NOMINEES FOR DIRECTOR.

     Nominees for Director.  The respective nominees have provided the following
information.

     Keith R. Coogan,  age 53, has served on our board of directors  since 2004.
Mr.  Coogan is chief  executive  officer of Software  Spectrum,  Inc.,  a global
business-to-business software services provider that is currently a wholly owned
subsidiary of Level 3 Communications, Inc., but from 1991 to 2002 was a publicly
traded  corporation.  From 1990 to 2002,  he served in various  other  executive
officer  positions  with Software  Spectrum,  Inc.,  including vice president of
finance and operations  and chief  operating  officer.  He is also a director of
CompX. Mr. Coogan is a member of our audit committee and management  development
and compensation committee and chairman of CompX's audit committee.

     Cecil H. Moore,  Jr.,  age 66, has served on our board of  directors  since
2003.  Mr.  Moore is  currently a private  investor and retired from KPMG LLP in
2000  after 37 years in which he served in  various  capacities  with the public
accounting  firm.  Among other  positions,  he served as managing partner of the
firm's Dallas,  Texas business unit from 1990 to 1999.  Prior to 1990, Mr. Moore
was partner-in-charge of the audit and accounting practice of the firm's Dallas,
Texas  business unit for 12 years.  Mr. Moore is also a director and chairman of
the audit  committee  of Perot  Systems  Corporation,  a  worldwide  provider of
information  technology services and business  solutions.  He is chairman of our
audit committee and on the board of directors and audit committee of NL.

     George E. Poston,  age 70, has served on our board of directors since 2003.
From 2002 to 2003,  he  served as a  director  of NL. He has been  president  of
Poston  Real  Estate Co., a privately  held  commercial  real estate  investment
company,  and  president  of Poston  Capital  Co., a privately  held  investment
company,  since  1970.  Mr.  Poston  is a  member  of our  audit  committee  and
management development and compensation committee.

     Glenn R. Simmons,  age 78, has served on our board of directors since 2003.
Mr. Simmons has been vice chairman of the board of Valhi and Contran since prior
to 2001.  Mr. Simmons has been chairman of the board of CompX and Keystone since
prior to 2001 and also  serves on the board of  directors  of NL and  TIMET.  In
2004,  Keystone  filed a voluntary  petition for  reorganization  under  federal
bankruptcy laws and emerged from the bankruptcy  proceedings in August 2005. Mr.
Simmons has been an executive  officer or director of various  companies related
to Valhi and Contran since 1969. He is a brother of Harold C. Simmons.

     Harold C.  Simmons,  age 74,  has served as our  chairman  of the board and
chief  executive  officer since 2003. Mr. Simmons has served as chief  executive
officer of NL since 2003 and chairman of the board of NL since prior to 2001. He
also has served as  chairman of the board of TIMET since  November  2005,  chief
executive  officer of TIMET from November 2005 to January 2006 and vice chairman
of the board of TIMET from 2004 to November  2005. Mr. Simmons has been chairman
of the board of Valhi and Contran  since  prior to 2001 and was chief  executive
officer of Valhi from prior to 2001 to 2002.  Mr.  Simmons has been an executive
officer or director  of various  companies  related to Valhi and  Contran  since
1961. Mr. Simmons is a brother of Glenn R. Simmons.

     R. Gerald Turner,  age 60, has served on our board of directors since 2003.
From May 2003 to December  2003,  he was a director  of NL. He has served  since
1995 as president of Southern  Methodist  University in Dallas,  Texas.  He held
previous   executive  and   administrative   positions  at  the   University  of
Mississippi,  the University of Oklahoma and Pepperdine University. He serves on
the  board of  directors  of J.C.  Penney  Corporation,  Inc.,  American  Beacon
Advisors Funds and First Broadcasting  Investment Partners, LLC. Dr. Turner is a
member of our audit  committee and chairman of our  management  development  and
compensation committee.

     Steven L.  Watson,  age 55,  has served as our vice  chairman  of the board
since 2004 and on our board of directors  since 2003.  Mr. Watson has been chief
executive  officer of Valhi since 2002 and president and a director of Valhi and
Contran since 1998. He has also served as chief executive officer of TIMET since
January 2006 and vice chairman of the board of TIMET since  November  2005.  Mr.
Watson is also a director of CompX, Keystone and NL. Mr. Watson has served as an
executive  officer or director of various companies related to Valhi and Contran
since 1980.

                MEETINGS AND COMMITTEES OF THE BOARD OF DIRECTORS

     The board of  directors  held  three  meetings  and took  action by written
consent on three occasions in 2005.  Each director  participated in at least 90%
of all of such meetings and of the 2005  meetings of the  committees on which he
served at the time.  It is expected  that each  director  will attend our annual
meetings of stockholders,  which are held immediately before the annual meetings
of the board of  directors.  All members of the board of directors  attended our
2005 annual stockholder meeting.

     The board of  directors  has  established  and  delegated  authority to two
standing  committees,  which are  described  below.  The board of  directors  is
expected  to elect  the  members  of the  standing  committees  at the  board of
directors annual meeting immediately  following the annual stockholder  meeting.
The board of directors  has  previously  established,  and from time to time may
establish,   other   committees   to   assist  it  in  the   discharge   of  its
responsibilities.

     Audit Committee.  Our audit committee  assists with the board of directors'
oversight  responsibilities  relating to our financial  accounting and reporting
processes and auditing  processes.  The  responsibilities of our audit committee
are more  specifically  set forth in the amended and  restated  audit  committee
charter,  a copy of which is attached as Exhibit A to this proxy  statement  and
also  available  under  the  corporate   governance   section  of  our  website,
www.kronostio2.com.  Applying the requirements of the NYSE listing standards and
SEC regulations, as applicable, the board of directors has determined that:

     o    each  member  of  our  audit  committee  is  independent,  financially
          literate and has no material  relationship  with us other than serving
          as our director; and

     o    Mr. Cecil H. Moore, Jr. is an "audit committee financial expert."

     No member of our audit  committee  serves on more than three public company
audit  committees.  For further  information on the role of our audit committee,
see "Audit  Committee  Report." The current  members of our audit  committee are
Cecil H. Moore, Jr. (chairman),  Keith R. Coogan, George E. Poston and R. Gerald
Turner. Our audit committee held ten meetings in 2005.

     Management   Development   and   Compensation   Committee.   The  principal
responsibilities of our management development and compensation committee are:

     o    to recommend  to the board of directors  whether or not to approve any
          proposed  charge  to us  pursuant  to an  ISA  with a  related  parent
          company;

     o    to  review,  approve  or  administer  certain  matters  regarding  our
          employee  benefit  plans  or  programs,   including  annual  operating
          earnings bonus awards;

     o    to  review,  approve,  administer  and grant  awards  under our equity
          compensation plan; and

     o    to review and administer such other compensation  matters as the board
          of directors may direct from time to time.

     The board of directors has  determined  that each member of our  management
development  and  compensation  committee  is  independent  by applying the NYSE
director  independence  standards.  For further  information  on the role of our
management development and compensation  committee,  see "Executive Compensation
Report." The current  members of our  management  development  and  compensation
committee are R. Gerald Turner (chairman), Keith R. Coogan and George E. Poston.
Our management development and compensation committee held one meeting in 2005.

                               EXECUTIVE OFFICERS

     Set forth below is certain information  relating to our executive officers.
Each  executive  officer  serves  at the  pleasure  of the  board of  directors.
Biographical  information with respect to Harold C. Simmons and Steven L. Watson
is set forth under "Election of Directors-Nominees for Director."

          Name         Age                    Position(s)
- ---------------------- ---  ----------------------------------------------------

Harold C. Simmons.....  74   Chairman of the Board and Chief Executive Officer
Steven L. Watson......  55   Vice Chairman of the Board
Ulfert Fiand..........  57   President, Manufacturing and Technology
H. Joseph  Maas.......  54   President, Sales and Marketing
Douglas C. Weaver.....  64   Senior Vice President, Development
James W. Brown........  49   Vice President and Controller
Robert D. Graham......  50   Vice President, General Counsel and Secretary
Kelly D. Luttmer......  42   Vice President and Tax Director
John A. St. Wrba......  49   Vice President and Treasurer
Gregory M. Swalwell...  49   Vice President, Finance and Chief Financial Officer


     Ulfert  Fiand has served as our  president,  manufacturing  and  technology
since 2004 and previously served as our senior vice president, manufacturing and
technology since 2003. Since 2001, he has served as president, manufacturing and
technology of KII. Dr. Fiand joined KII in 1988, and previously  served as group
leader  and  director  of  chloride  process  technology,  director  of  process
technology and vice president of production & process technology.

     H. Joseph Maas has served as our president,  sales and marketing since 2004
and served as our senior vice  president,  sales and marketing  since 2003. From
1985 to 2003, Mr. Maas served as our director of marketing and later as our vice
president of marketing.  From 1978 to 2003,  Mr. Maas held several  positions in
commercial  development,  marketing  and  planning  for various  divisions of NL
(Rheox and Spencer Kellogg).

     Douglas C.  Weaver has served as our  senior  vice  president,  development
since 2003.  Mr. Weaver served as our vice  president,  development  since 1998.
Prior to that,  Mr.  Weaver  served in various  manufacturing,  engineering  and
planning capacities with NL since joining NL in 1973.

     James W. Brown has served as vice  president  and  controller  of us and NL
since 2003.  From 1998 to 2002, he served as vice president and chief  financial
officer of  Software  Spectrum,  Inc.,  a global  business-to-business  software
services  provider that is a wholly owned subsidiary of Level 3  Communications,
Inc., but from 1991 to 2002,  was a publicly  traded  corporation.  From 1994 to
1998,  Mr. Brown served as vice  president,  corporate  accounting of Affiliated
Computer  Services,  Inc.,  a  provider  of  business  process  and  information
technology outsourcing solutions.

     Robert  D.  Graham  has  served  as vice  president,  general  counsel  and
secretary  of us and NL since  2003,  executive  vice  president  of TIMET since
February 2006 and vice  president of TIMET from 2004 to 2006 and vice  president
of Valhi and Contran  since 2002.  From 1997 to 2002,  Mr.  Graham  served as an
executive officer,  and later as executive vice president and general counsel of
Software  Spectrum,  Inc. From 1985 to 1997, Mr. Graham was a partner in the law
firm of Locke Purnell Rain Harrell (A Professional  Corporation),  a predecessor
to Locke Liddell & Sapp LLP.

     Kelly D. Luttmer has served as vice president of us, CompX, Contran, NL and
Valhi  since  2004,  tax  director  of us and NL since 2003 and tax  director of
CompX,  Valhi and Contran since 1998.  Ms.  Luttmer has served in tax accounting
positions with various companies related to Valhi and Contran since 1989.

     John A.  St.  Wrba has  served  as our vice  president  since  2004 and our
treasurer of since 2003.  He has also served as vice  president and treasurer of
Valhi since 2005,  TIMET and Contran  since 2004 and NL since 2003.  He was NL's
assistant  treasurer  from 2002 to 2003.  From 2000 until 2002, he was assistant
treasurer  of Kaiser  Aluminum & Chemical  Corporation,  a leading  producer  of
fabricated aluminum products.

     Gregory  M.  Swalwell  has served as chief  financial  officer of us and NL
since 2004, vice  president,  finance of us and NL since 2003, vice president of
TIMET since 2004 and vice  president  and  controller of Valhi and Contran since
prior to 2001.  Mr.  Swalwell has served in  accounting  positions  with various
companies related to Valhi and Contran since 1988.

                               SECURITY OWNERSHIP

     Ownership of Kronos Worldwide.  The following table and footnotes set forth
as of the record date the beneficial ownership, as defined by regulations of the
SEC, of our common stock held by each individual, entity or group known to us to
own  beneficially  more than 5% of the  outstanding  shares of our common stock,
each  director,  each  named  executive  officer  and all of our  directors  and
executive officers as a group. See footnote (4) below for information concerning
the relationships of certain  individuals and entities that may be deemed to own
indirectly and beneficially more than 5% of the outstanding shares of our common
stock.  All  information is taken from or based upon  ownership  filings made by
such individuals or entities with the SEC or upon  information  provided by such
individuals or entities.


                                                                              Kronos Worldwide Common Stock
                                                                      ----------------------------------------------
                                                                          Amount and Nature of        Percent of
                      Name of Beneficial Owner                          Beneficial Ownership (1)     Class (1)(2)
- --------------------------------------------------------------------- ---------------------------- -----------------

                                                                                                  
Harold C. Simmons (3)...............................................             4,755 (4)                *
    Valhi, Inc. (3).................................................        28,888,821 (4)              59.0%
    NL Industries, Inc (3)..........................................        17,516,132 (4)              35.8%
    TIMET Finance Management Company (3)............................             5,203 (4)                *
    Annette C. Simmons (3)..........................................            36,356 (4)                *
                                                                        --------------
                                                                            46,451,267 (4)              94.9%
Keith R. Coogan.....................................................               500                    *
Cecil H. Moore, Jr..................................................             1,012 (4)                *
George E. Poston....................................................             2,000                    *
Glenn R. Simmons....................................................               708 (4)                *
R. Gerald Turner....................................................             1,536                    *
Steven L. Watson....................................................             4,733 (4)                *
Ulfert Fiand........................................................               -0-                   -0-
H. Joseph Maas......................................................               -0-                   -0-
James W. Brown......................................................               -0-                   -0-
All our directors and executive officers as a group (15 persons)....        46,461,756 (4)              94.9%


- --------------
*    Less than 1%.

(1)  Except as otherwise noted,  the listed entities,  individuals or group have
     sole  investment  power and sole  voting  power as to all  shares set forth
     opposite their names.

(2)  The  percentages  are  based  on  48,949,549  shares  of our  common  stock
     outstanding as of the record date.

(3)  The business  address of Valhi,  NL and Harold C. and Annette C. Simmons is
     Three  Lincoln  Centre,  5430  LBJ  Freeway,   Suite  1700,  Dallas,  Texas
     75240-2697. The business address of TFMC is 300 Delaware Avenue, Suite 900,
     Wilmington, Delaware 19801.

(4)  Valhi and TFMC are the direct  holders of  approximately  83.1% and 0.5% of
     the  outstanding  shares of NL  common  stock,  respectively.  TIMET is the
     direct  holder of 100% of the  outstanding  shares of common stock of TFMC.
     Tremont,  Annette C. Simmons, the CMRT, Valhi and Harold C. Simmons are the
     holders of approximately 33.5%, 12.7%, 10.2%, 3.8% and 2.6%,  respectively,
     of the  outstanding  shares of TIMET common  stock.  The ownership of TIMET
     common  stock by Ms.  Simmons  includes  10,666,666  shares of TIMET common
     stock that she has the right to acquire upon conversion of 1,600,000 shares
     of TIMET series A preferred stock that she directly holds. The ownership of
     TIMET common stock by Valhi  includes  98,000  shares of TIMET common stock
     that Valhi has the right to acquire  upon  conversion  of 14,700  shares of
     TIMET series A preferred  stock that Valhi directly  holds.  The percentage
     ownership  of TIMET  common  stock  held by each of Ms.  Simmons  and Valhi
     assumes the full  conversion of only the shares of TIMET series A preferred
     stock she or Valhi owns, respectively.

     VHC, the Foundation,  the CDCT No. 2 and the CMRT are the direct holders of
     approximately 91.6%, 0.9%, 0.4% and 0.1%, respectively,  of the outstanding
     common stock of Valhi.  VGI, National and Contran are the direct holders of
     87.4%,  10.3% and 2.3%,  respectively,  of the outstanding  common stock of
     VHC.   National,   NOA  and  Dixie  Holding  are  the  direct   holders  of
     approximately 73.3%, 11.4% and 15.3%, respectively,  of the outstanding VGI
     common stock. Contran and NOA are the direct holders of approximately 85.7%
     and 14.3%, respectively,  of the outstanding National common stock. Contran
     and  Southwest  are the direct  holders of  approximately  49.9% and 50.1%,
     respectively, of the outstanding NOA common stock. Dixie Rice is the direct
     holder of 100% of the outstanding common stock of Dixie Holding. Contran is
     the  holder  of 100% of the  outstanding  common  stock of  Dixie  Rice and
     approximately 88.9% of the outstanding common stock of Southwest.

     Substantially all of Contran's  outstanding  voting stock is held by trusts
     established for the benefit of certain children and grandchildren of Harold
     C.  Simmons,  of which  Mr.  Simmons  is the sole  trustee,  or held by Mr.
     Simmons or  persons  or other  entities  related  to Mr.  Simmons.  As sole
     trustee of these trusts,  Mr.  Simmons has the power to vote and direct the
     disposition  of the  shares of  Contran  stock  held by these  trusts.  Mr.
     Simmons,  however,  disclaims  beneficial  ownership of any Contran  shares
     these trusts hold.

     The Foundation  directly holds approximately 0.9% of the outstanding shares
     of Valhi common stock. This foundation is a tax-exempt foundation organized
     for charitable purposes.  Harold C. Simmons is the chairman of the board of
     this foundation.

     The CDCT No. 2 directly holds  approximately 0.4% of the outstanding shares
     of Valhi common stock. U.S. Bank National Association serves as the trustee
     of the CDCT No. 2.  Contran  established  the CDCT No. 2 as an  irrevocable
     "rabbi trust" to assist Contran in meeting  certain  deferred  compensation
     obligations that it owes to Harold C. Simmons. If the CDCT No. 2 assets are
     insufficient to satisfy such obligations,  Contran must satisfy the balance
     of such  obligations.  Pursuant  to the  terms of the CDCT No.  2,  Contran
     retains  the  power to vote the  shares  held by the  CDCT No.  2,  retains
     dispositive  power  over  such  shares  and  may  be  deemed  the  indirect
     beneficial owner of such shares.

     The CMRT directly holds  approximately  10.2% of the outstanding  shares of
     TIMET  common  stock and 0.1% of the  outstanding  shares  of Valhi  common
     stock.  Contran sponsors this trust to permit the collective  investment by
     master  trusts  that  maintain  assets of certain  employee  benefit  plans
     Contran and related  entities adopt.  Harold C. Simmons is the sole trustee
     of this  trust and a member of the  investment  committee  for this  trust.
     Contran's  board of  directors  selects  the  trustee  and  members of this
     trust's  investment  committee.  Certain  of  our  executive  officers  are
     participants  in one or more of the  employee  benefit  plans  that  invest
     through this trust. Each of such persons disclaims  beneficial ownership of
     any of the  shares  this  trust  holds,  except to the extent of his or her
     individual  vested  beneficial  interest,  if any, in the assets this trust
     holds.

     Harold C. Simmons is the chairman of the board and chief executive  officer
     of us and NL and the  chairman  of the  board  of each of  TIMET,  Tremont,
     Valhi, VHC, VGI, National,  NOA, Dixie Holding,  Dixie Rice,  Southwest and
     Contran.

     By virtue of the  holding  of the  offices,  the  stock  ownership  and his
     services as trustee,  all as described  above, (a) Harold C. Simmons may be
     deemed to control  certain of such entities and (b) Mr. Simmons and certain
     of such entities may be deemed to possess indirect beneficial  ownership of
     shares  directly  held by  certain  of such other  entities.  However,  Mr.
     Simmons disclaims  beneficial  ownership of the shares  beneficially owned,
     directly or indirectly,  by any of such  entities,  except to the extent of
     his vested beneficial interest,  if any, in shares held by the CMRT and his
     interest as a beneficiary of the CDCT No. 2. Mr. Harold  Simmons  disclaims
     beneficial  ownership of all shares of our common stock beneficially owned,
     directly or indirectly, by Valhi, NL or TFMC.

     All of our  directors  or  executive  officers  who are also  directors  or
     executive  officers of Valhi, NL, TFMC or their parent  companies  disclaim
     beneficial  ownership of the shares of our common stock that such companies
     directly or indirectly hold.

     Annette  C.  Simmons  is the wife of Harold C.  Simmons.  She is the direct
     owner of 36,356  shares of our common  stock,  119,475  shares of NL common
     stock,  228,000  shares of TIMET common  stock,  1,600,000  shares of TIMET
     series A  preferred  stock and 43,400  shares of Valhi  common  stock.  Mr.
     Simmons  may be  deemed  to share  indirect  beneficial  ownership  of such
     shares. Mr. Simmons disclaims all such beneficial ownership.

     The  Annette  Simmons  Grandchildren's  Trust,  a trust of which  Harold C.
     Simmons and Annette C. Simmons are  co-trustees  and the  beneficiaries  of
     which are the grandchildren of Annette C. Simmons,  is the direct holder of
     36,500 shares of Valhi common  stock.  Mr.  Simmons,  as co-trustee of this
     trust,  has the power to vote and direct the  disposition  of the shares of
     Valhi  common  stock this  trust  directly  holds.  Mr.  Simmons  disclaims
     beneficial  ownership  of any shares of Valhi  common stock that this trust
     holds.

     Harold C. Simmons is the direct owner of 4,755 shares of our common  stock,
     257,000 shares of NL common stock (including options  exercisable for 4,000
     shares of NL common  stock),  1,933,700  shares of TIMET  common  stock and
     3,383 shares of Valhi common stock.

     NL and one of its subsidiaries directly hold 3,522,967 and 1,186,200 shares
     of  Valhi  common  stock,  respectively.  Since  NL  is  a  majority  owned
     subsidiary of Valhi,  and pursuant to Delaware law, Valhi treats the shares
     of Valhi common stock that NL and its subsidiary hold as treasury stock for
     voting purposes.  For the purposes of calculating the percentage  ownership
     of the  outstanding  shares of Valhi  common stock as of the record date in
     this proxy statement such shares are not deemed outstanding.

     The business  address of Contran,  the CDCT No. 2, the CMRT, Dixie Holding,
     the Foundation,  National, NOA, TIMET, Tremont, Valhi, VGI and VHC is Three
     Lincoln Centre, 5430 LBJ Freeway, Suite 1700, Dallas, Texas 75240-2697. The
     business address of Dixie Rice is 600 Pasquiere Street, Gueydan,  Louisiana
     70542.  The  business  address of  Southwest  is 402 Canal  Street,  Houma,
     Louisiana 70360.

     We understand that Contran and related  entities may consider  acquiring or
disposing  of  shares of our  common  stock  through  open  market or  privately
negotiated transactions, depending upon future developments,  including, but not
limited to, the  availability  and alternative uses of funds, the performance of
our common stock in the market,  an  assessment  of our business and  prospects,
financial and stock market  conditions and other factors deemed relevant by such
entities.  We may similarly consider  acquisitions of shares of our common stock
and acquisitions or dispositions of securities issued by related entities.

     Ownership  of  Related  Companies.  Some  of our  directors  and  executive
officers own equity securities of several companies related to us.

     Ownership of NL and Valhi.  The following table and footnotes set forth the
beneficial ownership, as of the record date, of the shares of common stock of NL
and Valhi held by each of our directors, each named executive officer and all of
our directors and executive  officers as a group.  All information is taken from
or based upon  ownership  filings made by such  individuals or entities with the
SEC or upon information provided by such individuals or entities.


                                           NL Common Stock                          Valhi Common Stock
                                --------------------------------------  -------------------------------------------
                                                              Percent                                      Percent
                                      Amount and Nature         of             Amount and Nature              of
     Name of Beneficial                 of Beneficial          Class             of Beneficial              Class
            Owner                       Ownership (1)         (1)(2)             Ownership (1)              (1)(3)
- ------------------------------  ---------------------------  ---------  -------------------------------  ----------
                                                                                                  
Harold C. Simmons...........               257,000  (4)(5)       *                  3,383  (4)               *
  Valhi, Inc................            40,350,931  (4)        83.1%                  n/a                   n/a
  TIMET Finance Management
    Company.................               222,100  (4)          *                    -0-                   -0-
  Valhi Holding Company.....                   -0-  (4)         -0-           106,098,763  (4)             91.6%
  Contran Corporation.......                   -0-  (4)         -0-               439,400  (4)(6)            *
  Harold Simmons Foundation,
    Inc.....................                   -0-  (4)         -0-             1,006,500  (4)               *
  The Combined Master
    Retirement Trust........                   -0-  (4)         -0-               115,000  (4)               *
  Annette C. Simmons........               119,475  (4)          *                 43,400  (4)               *
  Annette Simmons
    Grandchildren's Trust...                   -0-  (4)         -0-                36,500  (4)               *
                                ------------------                      -----------------
                                        40,949,506             84.3%          107,742,946                  93.1%


Keith R. Coogan.............                   -0-              -0-                   -0-                   -0-
Cecil H. Moore, Jr..........                 1,000               *                    -0-                   -0-
George E. Poston............                   -0-              -0-                   -0-                   -0-
Glenn R. Simmons............                 9,000  (4)          *                 12,247  (4)(7)            *
R. Gerald Turner............                 1,000               *                    -0-                   -0-
Steven L. Watson............                13,000  (4)(5)       *                117,246  (4)(5)            *
Ulfert Fiand................                 1,200  (5)          *                    -0-                   -0-
H. Joseph Maas..............                 1,200  (5)          *                    -0-                   -0-
James W. Brown..............                   -0-              -0-                   -0-                   -0-
All   our    directors   and
  executive  officers  as  a
  group  (15 persons).....              40,983,506  (4)(5)     84.4%          108,040,205  (4)(5)(6)(7)    93.1%


- -------------------------
*    Less than 1%.

(1)  Except as otherwise noted,  the listed entities,  individuals or group have
     sole  investment  power and sole  voting  power as to all  shares set forth
     opposite their names.  The number of shares and percentage of ownership for
     each  entity,  individual  or group  assumes the  exercise by such  entity,
     individual  or group  (exclusive  of  others)  of stock  options  that such
     entity,  individual or group may exercise  within 60 days subsequent to the
     record date.

(2)  The  percentages  are  based  on  48,563,034  shares  of  NL  common  stock
     outstanding as of the record date.

(3)  The  percentages  are based on  115,778,278  shares of Valhi  common  stock
     outstanding  as of  the  record  date.  For  purposes  of  calculating  the
     outstanding  shares of Valhi common stock as of the record date,  3,522,967
     and  1,186,200  shares of Valhi common stock held by NL and a subsidiary of
     NL,  respectively,  are treated as treasury  stock for voting  purposes and
     excluded from the amount of Valhi common stock outstanding.

(4)  See  footnote  (4) to the  "Ownership  of  Kronos  Worldwide"  table  for a
     description of certain  relationships  among the  individuals,  entities or
     groups appearing in this table. All our directors or executive officers who
     are also directors or executive officers of Valhi, TFMC, VHC, Contran,  the
     Foundation or their parent companies disclaim  beneficial  ownership of the
     shares  of  NL or  Valhi  common  stock  that  such  entities  directly  or
     indirectly own.

     Other than the securities he holds  directly,  Harold C. Simmons  disclaims
     beneficial  ownership of any and all securities  that his wife,  Annette C.
     Simmons, directly or indirectly owns.

(5)  The shares of NL or Valhi common stock shown as beneficially  owned by such
     person or group include the following number of shares such person or group
     has the right to  acquire  upon the  exercise  of stock  options  that such
     person or group may exercise within 60 days subsequent to the record date:


                                                    Shares of NL Common Stock     Shares of Valhi Common Stock
                                                   Issuable Upon the Exercise     Issuable Upon the Exercise of
                                                     of Stock Options On or               Stock Options
              Name of Beneficial Owner                 Before May 27, 2006          On or Before May 27, 2006
     -----------------------------------------    ---------------------------     -----------------------------

                                                                                       
     Harold C. Simmons........................                 4,000                             -0-
     Steven L. Watson.........................                 4,000                         100,000
     Ulfert Fiand.............................                 1,200                             -0-
     H. Joseph Maas...........................                 1,200                             -0-
     All our directors and executive  officers
       as a group (15 persons)................                18,000                         266,600



(6)  Represents the 439,400 shares of Valhi common stock the CDCT No. 2 directly
     holds.

(7)  The shares of Valhi  common stock shown as  beneficially  owned by Glenn R.
     Simmons include 800 shares his wife holds in her retirement  account,  with
     respect to which shares he disclaims beneficial ownership.



                COMPENSATION OF DIRECTORS AND EXECUTIVE OFFICERS
                              AND OTHER INFORMATION

     Compensation  of  Directors.  In 2005,  our  directors  received  an annual
retainer of $20,000,  paid in quarterly  installments,  plus a fee of $1,000 per
day for  attendance  at  meetings  and at a daily rate ($125 per hour) for other
services  rendered on behalf of our board of  directors or its  committees.  The
chairman of our audit  committee and any member of our audit  committee whom the
board  identified as an "audit committee  financial  expert" for purposes of the
annual proxy statement received an annual retainer of $10,000, paid in quarterly
installments  (provided  that if one person served in both  capacities  only one
such retainer was paid),  and other members of our audit  committee  received an
annual  retainer  of  $5,000,  paid  in  quarterly  installments.  If one of our
directors  dies  while  serving  on  our  board  of  directors,  his  designated
beneficiary  or estate will be entitled to receive a death  benefit equal to the
annual  retainer  then in effect.  We reimburse  our  directors  for  reasonable
expenses incurred in attending meetings and in the performance of other services
rendered on behalf of our board of directors or its committees.

     On the day of  each  annual  stockholder  meeting,  each  of our  directors
receives a grant of shares of our common stock as  determined  by the  following
formula based on the closing price of a share of our common stock on the date of
such meeting.

       Range of Closing Price Per                    Shares of Common
       Share on the Date of Grant                  Stock to Be Granted
       --------------------------                  -------------------

         Under $5.00                                       2,000
         $5.00 to $9.99                                    1,500
         $10.00 to $20.00                                  1,000
         Over $20.00                                         500

     As a result of the $30.75 per share  closing  price of our common  stock on
May 19,  2005,  the date of our 2005  annual  stockholder  meeting,  each of our
directors  elected  on that date  received  a grant of 500  shares of our common
stock.


     Intercorporate   Services   Agreements.   Contran   and   certain   of  its
subsidiaries,  including us, have entered into ISAs  pursuant to which  Contran,
among other  things,  provides  the  services of certain of our named  executive
officers  to  certain  of   Contran's   subsidiaries,   including   us  and  our
subsidiaries.  For a discussion of these ISAs,  see "Certain  Relationships  and
Transactions-Intercorporate Services Agreements."

     Summary of Cash and Certain Other Compensation of Executive  Officers.  The
summary  compensation  table below provides  information  concerning  annual and
long-term  compensation  we and our  subsidiaries  paid or accrued for  services
rendered  to us and our  subsidiaries  during the past three  years by our chief
executive officer and each of the four other executive officers with the highest
2005 total salary and bonus, or charge to us or our subsidiaries pursuant to the
ISA between us and Contran.


                                    SUMMARY COMPENSATION TABLE (1)

                                                                   Annual Compensation (2)
                    Name and                                 ------------------------------------       All Other
               Principal Position                     Year         Salary              Bonus          Compensation
- -------------------------------------------------     ----   -----------------   ----------------   ----------------

                                                                                        
Harold C. Simmons (3).............................    2005   $   1,038,375 (3)   $        -0- (3)   $       -0-
Chairman of the Board and Chief Executive Officer     2004         988,005 (3)            -0- (3)           -0-
                                                      2003         190,000 (3)            -0- (3)           -0-

Steven L. Watson (3)..............................    2005         500,875 (3)            -0- (3)           -0-
Vice Chairman of the Board                            2004         363,905 (3)            -0- (3)           -0-

Ulfert Fiand......................................    2005         243,817 (4)        163,840 (4)(5)        -0-
President, Manufacturing and Technology               2004         209,664 (4)        153,044 (4)(5)        -0-
                                                      2003         173,786 (4)        121,650 (4)(5)        -0-

H. Joseph Maas....................................    2005         234,250            150,900 (5)        22,016 (6)
President, Sales and Marketing                        2004         223,000            162,800 (5)        20,531 (6)

James W. Brown (3)................................    2005         344,800 (3)            -0- (3)           -0-
Vice President and Controller                         2004         201,900 (3)            -0- (3)           -0-
- --------------------



(1)  For the  periods  presented  for each  named  executive  officer,  no stock
     options  or shares of  restricted  stock  were  granted  nor  payouts  made
     pursuant to  long-term  incentive  plans.  Therefore,  the columns for such
     compensation have been omitted.

(2)  Other than Dr. Fiand,  no named  executive  officer  received "other annual
     compensation," as defined by SEC rules,  from us or our  subsidiaries.  For
     each of the three years presented,  Dr. Fiand received an annual automobile
     allowance that is less than the amount required to be reported  pursuant to
     SEC rules.  Therefore,  the column for other annual  compensation  has been
     omitted.

(3)  Messrs.  Simmons,  Watson and Brown are  employees of Contran.  The amounts
     shown in the summary  compensation  table as salary for them  represent the
     portion of the fees we and our  subsidiaries  paid pursuant to certain ISAs
     with  respect to the  services  they  rendered to us and our  subsidiaries.
     During 2003, Mr. Simmons provided his services to us pursuant to a Services
     Agreement between NL, us and KII dated as of January 1, 1995 and amended as
     of April 1,  2002.  Other  than Mr.  Simmons,  the  charges  for the  named
     executive  officers'  services  under  this  ISA for  2003  to us were  not
     specifically  identifiable to a particular  executive  officer and were not
     allocable between us and KII. During 2004 and 2005, Messrs. Simmons, Watson
     and Brown  provided  their services to us pursuant to an ISA between us and
     Contran,  the charges  for which were  specifically  identifiable  to these
     named executive officers.

     The  components  of  salary  shown in the  summary  compensation  table for
     Messrs.  Simmons,  Watson and Brown are provided below. The amount shown in
     the table as salary  for each of  Messrs.  Simmons  and Watson for 2004 and
     2005 also includes director compensation paid to each of them by us.


                                                        2003              2004             2005
                                                  ----------------  ----------------  ----------------
                                                                             
     Harold C. Simmons (a)
       Contran ISA Fee.........................   $     190,000 (b) $     950,000 (b) $  1,000,000 (b)
       Kronos Worldwide Cash Director Fees.....             -0-            23,000           23,000
       Kronos Worldwide Director Stock.........             -0-            15,005           15,375
                                                  -------------     -------------     ------------
                                                  $     190,000     $     988,005     $  1,038,375
                                                  =============     =============     ============

     Steven L. Watson (a)
       Contran ISA Fee.........................                     $     325,900 (b) $    462,500 (b)
       Kronos Worldwide Cash Director Fees.....                            23,000           23,000
       Kronos Worldwide Director Stock.........                            15,005           15,375
                                                                    -------------     ------------
                                                                    $     363,905     $    500,875
                                                                    =============     ============

     James W. Brown (a)
       Contran ISA Fee.........................                     $     201,900 (b) $    344,800 (b)


- ----------------------------

     (a)  Mr. Simmons became an executive  officer of ours as of August 6, 2003.
          Mr. Watson became an executive  officer of ours as of October 8, 2004.
          Mr. Brown became an executive officer of ours as of October 31, 2003.

     (b)  Includes amounts allocated to KII, our wholly owned subsidiary,  under
          the ISA between Contran and us.

(4)  Dr. Fiand receives his cash  compensation in euros. We report these amounts
     in the summary compensation table above in U.S. dollars based on an average
     exchange  rate for each of 2005,  2004 and 2003 of  $1.25356,  $1.23470 and
     $1.12120 per Euro 1.00, respectively.

(5)  Represents amounts we paid pursuant to our Share-in-Performance Plan. For a
     description of this plan, see "Executive Compensation Report."

(6)  As shown  below,  all other  compensation  for Mr.  Maas  consisted  of (i)
     matching  contributions  we made or accrued pursuant to the savings feature
     of the NL savings plan,  (ii) retirement  contributions  we made or accrued
     pursuant to the NL savings plan and (iii) life insurance premiums we paid.


                                                                 NL Savings
                                                  NL Savings        Plan              Life
                                                    Plan         Retirement        Insurance
        Named Executive Officer         Year        Match       Contributions     Premiums (a)       Total
     ----------------------------      ------    -----------    -------------     ------------     ---------


                                                                                    
     H. Joseph Maas..............       2005      $  8,400        $ 11,550         $  2,066        $ 22,016
                                        2004         7,432          11,275            1,824          20,531

- -----------------------

(a)  Under the terms of the life insurance  policy  provided by these  premiums,
     Mr. Maas was entitled to a cash surrender value of approximately  $6,870 at
     December 31, 2005.

     No Grants of Stock Options or Stock Appreciation Rights. Neither we nor any
of our parent or  subsidiary  corporations  granted  any stock  options or stock
appreciation rights to our named executive officers during 2005.

     Stock  Option   Exercises  and  Holdings.   The  following  table  provides
information with respect to the amounts each of Harold C. Simmons,  Ulfert Fiand
and H.  Joseph Maas each  realized  in 2005 upon the  exercise of certain of his
stock options for NL common stock and the value of our named executive officers'
unexercised  stock  options for common  stock of our parent  corporations  as of
December 31, 2005. Neither we nor any of our parent or subsidiary  companies has
granted any stock appreciation rights nor have we granted any stock options. Mr.
James W. Brown does not hold any stock options  exercisable for the common stock
of any of our parent corporations.

                  AGGREGATE STOCK OPTION EXERCISES IN 2005 AND
                         DECEMBER 31, 2005 OPTION VALUES


                                                                Number of Shares
                                 Shares                            Underlying               Value of Unexercised
                                Acquired                      Unexercised Options at         In-the-Money Options
                                   on                         December 31, 2005 (#)        at December 31, 2005 (1)
                                Exercise       Value       ---------------------------   ---------------------------
            Name                  (#)         Realized     Exercisable   Unexercisable   Exercisable    Unexercisable
- ---------------------------     --------   -------------   -----------   -------------   -----------   --------------

                                                                                     
Harold C. Simmons
   NL Stock Options........        2,000   $  30,795 (2)         4,000             -0-   $    22,214   $         -0-

Steven L. Watson
   Valhi Stock Options.....          -0-         -0-           100,000             -0-     1,056,000             -0-
   NL Stock Options........          -0-         -0-             4,000             -0-        22,214             -0-
                                --------   ---------        ----------    ------------   -----------   -------------
                                     -0-         -0-           104,000             -0-     1,078,214             -0-

Ulfert Fiand
   NL Stock Options........        5,800      63,243 (2)           -0-           1,200           -0-           3,126

H. Joseph Maas
   NL Stock Options........        5,800      67,427 (2)           -0-           1,200           -0-           3,126

- ----------


(1)  Each aggregate value is based on the difference  between the exercise price
     of the individual stock options and the closing sale price per share of the
     underlying common stock on December 31, 2005. Such closing sale prices were
     $18.50 per share for Valhi  common stock and $14.09 per share for NL common
     stock.

(2)  The value  realized for this  exercise is based on the  difference  between
     either the  average of the high and low sales  prices or the  closing  sale
     price per share of the  underlying  common stock on the day of the exercise
     and the exercise price per share.

     Pension Plans. The Retirement  Program of NL Industries,  Inc. for its U.S.
employees provides lifetime retirement benefits to eligible employees.  In 1996,
NL approved the suspension of all future  accruals under the salaried  component
of the pension plan. At December 31, 2005, the estimated  accrued annual benefit
payable under this Pension Plan upon retirement at normal retirement age for Mr.
Maas was $26,778.

     Dr. Fiand is eligible to receive a pension through KII's German  operations
under the Bayer Pensionskasse and the Supplemental Pension Promise. All of KII's
employees in Germany  (including  wage  earners) who have  contributed  for five
years and are less than 55 years of age are covered by the Bayer  Pensionskasse.
Each employee  contributes 2% of eligible  earnings  excluding  bonus, up to the
social  security  contribution  ceiling  (currently  euro  63,000) and the Bayer
Pensionskasse  provides an annual benefit of 44% of such employee's  accumulated
contributions  (with a minimum benefit of approximately  euro 13 per month). The
Supplemental  Pension Promise also covers all employees of the German operations
who have completed ten years of service.  Our German operations accrue 11.25% of
the  participants'  eligible  annual  earnings  excluding bonus in excess of the
social  security  contribution  ceiling,  up to a maximum of euro  111,000.  The
Supplemental Pension Promise provides an annual retirement benefit of 20% of all
accruals made by our German operations. Benefits for both plans are payable upon
retirement and the  attainment of ages  specified in the plans.  No amounts were
paid or  distributed  under these plans to Dr. Fiand in 2005. As of December 31,
2005, the estimated  accrued annual  benefit  payable upon normal  retirement at
normal retirement age for Dr. Fiand was euro 29,190.

     Chief Operations  Management  Consultant.  Following his resignation as our
chief executive  officer in 2003,  Lawrence A. Wigdor entered into a consultancy
arrangement  with us pursuant to which Dr. Wigdor  provides  ongoing  management
services to our  titanium  dioxide  operations.  In 2005,  Dr.  Wigdor  received
monthly payments of $84,000 under the arrangement. For 2005, Dr. Wigdor received
an annual  discretionary bonus of $1.4 million. For the term of the arrangement,
Dr. Wigdor will receive annual discretionary  bonuses as determined by our chief
executive  officer.  Under the  consultancy  arrangement,  as amended in January
2006, if we terminate the  consultancy  arrangement  prior to December 31, 2008,
Dr.  Wigdor  will  receive  twelve  months  compensation  and medical and dental
coverage  through  December 31, 2008 and a pro-rata portion of any bonus for the
year in which the  termination  occurs.  The  arrangement  provides  Dr.  Wigdor
various other  benefits,  including,  medical and dental benefits and office and
secretarial support at our New Jersey office.

     During 2005,  Dr.  Wigdor  exercised  previously  granted stock options for
78,300  shares of NL common stock and realized an aggregate  value from the sale
of such shares of  $870,287.  The amount he realized  upon the exercise of stock
options is based on the  difference  between the  closing  price per share of NL
common stock on the day of each  exercise and the exercise  price per share.  At
December 31, 2005, Dr. Wigdor held  exercisable  stock options to purchase 3,000
shares of NL common stock and  unexercisable  stock  options to purchase  20,000
shares of NL common stock. Based on the difference between the exercise price of
his  individual  stock options and the $14.09 per share closing sale price of NL
common  stock  on  December  31,  2005,  the  value  of  his   exercisable   and
unexercisable stock options to purchase NL common stock was $25,395 and $52,100,
respectively.

     Following  his  resignation  in 2003,  Dr.  Wigdor  elected to receive  his
retirement  benefits under our U.S.  pension plan at an early retirement age. He
began receiving a monthly payment amount of $2,428 in 2003,  which will continue
for the remainder of his life.

     During 2005,  Dr.  Wigdor's  sister-in-law  and son were employed by us and
were paid  approximately  $45,500 and $68,300,  respectively,  and also received
customary employee benefits,  including medical insurance. Both persons continue
to be employed by us.

                      EQUITY COMPENSATION PLAN INFORMATION

     The following  table provides  summary  information as of December 31, 2005
with respect to equity  compensation plans under which our equity securities may
be  issued  to  employees  or  nonemployees  (such  as  directors,  consultants,
advisers,  vendors,  customers,  suppliers and lenders) in exchange for goods or
services.


                                        Column (A)                   Column (B)                   Column (C)
                                --------------------------   --------------------------    -------------------------
                                                                                             Number of Securities
                                                                                            Remaining Available for
                                                                                              Future Issuance Under
                                Number of Securities to be    Weighted-Average Exercise    Equity Compensation Plans
                                  Issued Upon Exercise of       Price of Outstanding         (Excluding Securities
                                   Outstanding Options,               Options,                   Reflected in
        Plan Category               Warrants and Rights          Warrants and Rights              Column (A))
- ---------------------------     --------------------------   --------------------------    -------------------------

                                                                                           
Equity compensation plans
approved by security
holders....................                   -0-                    $    -0-                       143,500

Equity compensation plans
not approved by security
holders....................                   -0-                         -0-                           -0-

Total......................                   -0-                         -0-                       143,500



                         CORPORATE GOVERNANCE DOCUMENTS

     Code of Business  Conduct and  Ethics.  We have  adopted a code of business
conduct and ethics that applies to all of our directors, officers and employees,
including  our  principal   executive  officer,   principal  financial  officer,
principal  accounting  officer and  controller.  Only the board of directors may
amend the code.  Only our audit  committee  or other  committee  of the board of
directors with specific delegated  authority may grant a waiver of this code. We
will  disclose  amendments  to or waivers of the code as required by law and the
applicable rules of the NYSE.

     Corporate  Governance  Guidelines.  We have  adopted  corporate  governance
guidelines to assist the board of directors in exercising its  responsibilities.
Among other things,  the corporate  governance  guidelines  provide for director
qualifications,  for independence  standards and responsibilities,  for approval
procedures  for ISAs  and that our  audit  committee  chairman  presides  at all
meetings of the non-management or independent directors.

     Audit  Committee  Charter.  We have adopted an amended and  restated  audit
committee charter under which our audit committee operates.  Among other things,
our audit  committee  charter  provides the purpose,  authority,  resources  and
responsibilities of the committee.

     A copy of each of these three documents,  among others, is available on our
website at www.kronostio2.com  under the corporate governance section. A copy of
the amended and restated audit  committee  charter is also attached as Exhibit A
to this  proxy  statement.  In  addition,  any person may obtain a copy of these
three documents without charge, by sending a written request to the attention of
our corporate  secretary at Kronos Worldwide,  Inc., Three Lincoln Centre,  5430
LBJ Freeway, Suite 1700, Dallas, Texas 75240-2697.

             SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

     Section  16(a)  of the  Securities  Exchange  Act  requires  our  executive
officers,  directors and persons who own more than 10% of a registered  class of
our equity  securities  to file reports of ownership  with the SEC, the NYSE and
us. Based  solely on the review of the copies of such forms and  representations
by certain reporting persons,  we believe that for 2005 our executive  officers,
directors and 10% stockholders  complied with all applicable filing requirements
under  section  16(a) except that after its formation in August 2005 as a parent
company  of Valhi,  VHC  failed  to file  timely  its Form 3 and  three  Forms 4
reporting nine purchases of our common stock by Valhi,  which  transactions were
all timely reported on Forms 4 by our other parent companies.

                          EXECUTIVE COMPENSATION REPORT

     During  2005,  our  management   development  and  compensation   committee
administered  certain  matters  regarding  the  compensation  of  our  executive
officers.

Kronos Worldwide ISA

     During 2005, we paid certain fees to Contran for services provided pursuant
to an ISA between Contran and us. Such services provided under this ISA included
the services of the following executive officers of ours:

      Name                           Positions with Kronos Worldwide
- -----------------          ----------------------------------------------------
Harold C. Simmons          Chairman of the Board and Chief Executive Officer
Steven L. Watson           Vice Chairman of the Board
James W. Brown             Vice President and Controller
Robert D. Graham           Vice President, General Counsel and Secretary
Kelly D. Luttmer           Vice President and Tax Director
John A. St. Wrba           Vice President and Treasurer
Gregory M. Swalwell        Vice President, Finance and Chief Financial Officer



Contran  annually  determines  the  aggregate  fee to  charge  us  based  on the
following:

o    an  estimate  of the amount of time each  Contran  employee  that  performs
     services for us and our  subsidiaries  will spend on such services over the
     year; and

o    Contran's cost related to such employee, which includes the employee's base
     salary,  incentive  compensation and an overhead  component that takes into
     account other employment costs,  including  medical benefits,  unemployment
     and disability  insurance and pension costs and other costs of providing an
     office, equipment and supplies related to the provision of such services.

     The  portion  of the  annual  charge we pay under  the ISA  between  us and
Contran for the services of any particular  individual is capped at $1.0 million
in the aggregate to enhance our ability to deduct such charge for federal income
tax purposes.  The amount of the fee we paid in 2005 under this ISA for a person
who provided  services to us or our  subsidiaries  represents,  in  management's
view, the reasonable  equivalent of "compensation" for such services. It is also
management's  view that the  proposed  aggregate  charge to us under this ISA is
fair to us and our stockholders and the cost for the services provided under the
ISA would be no less  favorable to us than could  otherwise be obtained  from an
unrelated third party for comparable  services.  See "Certain  Relationships and
Transactions-Intercorporate  Services  Agreements"  for the aggregate  amount we
paid to Contran in 2005 under this ISA. For each named  executive  officer,  the
portion  of the  annual  charge  we  paid  in 2005 to  Contran  under  this  ISA
attributable to the services of such executive  officer is set forth in footnote
(3) to the  summary  compensation  table in this proxy  statement.  The  amounts
charged under this ISA are not dependent upon our financial performance.

     For 2005, our management  development and compensation  committee  reviewed
documentation  and discussed with management  Contran's ISA allocation  process,
including how Contran determined the necessary  personnel,  the estimated number
of full time  employees  that would be required to provide the  services and the
cost of such services  under this ISA. The committee then  recommended  that our
board of directors  approve the 2005  aggregate  service charge for the proposed
Contran services to be rendered to us under the ISA after concluding that:

o    the cost to employ  the  additional  personnel  necessary  to  perform  the
     quality of the services  provided by Contran would exceed the proposed 2005
     aggregate fee to be charged by Contran under this ISA; and

o    the cost for such services would be no less favorable than could  otherwise
     be obtained from an unrelated third party for comparable services.

Upon receiving the recommendation of our management development and compensation
committee that the ISA charge was fair and reasonable to us and our stockholders
and  that it was in our  best  interests  to  continue  receiving  the  services
presently  provided  by  Contran,  our  independent  directors,  with our  other
directors abstaining, approved the 2005 aggregate charge to us under this ISA.

     In making these determinations, our management development and compensation
committee relied on their collective business experience and judgment.

Other Executive Officers

     In 2005, our management development and compensation committee administered
certain matters  regarding the  compensation of Ulfert Fiand, H. Joseph Maas and
Douglas C. Weaver,  three of our executive  officers that we or our subsidiaries
employ.  For 2005, our cash compensation for these executive  officers generally
consisted of two primary  components:  base salary and annual operating earnings
bonus awards provided by our Share-in-Performance Plan.

     Base Salaries. Our management establishes base salaries for those executive
officers employed by us or our subsidiaries on a  position-by-position  basis by
conducting annual internal reviews of salary levels in an attempt to rank salary
and job value to each position.  Our  management  development  and  compensation
committee reviews changes in salaries of our operating management employed by us
or our  subsidiaries,  including those for Messrs.  Fiand,  Maas and Weaver.  In
2005, our management  development and compensation  committee reviewed increases
in the base  salaries for Messrs.  Fiand,  Maas and Weaver based on the expected
inflation  rate  in  the  applicable   country  for  the  employee  and  further
recognition  of their  promotions and added  responsibilities.  The 2005 average
percentage increase in base salary for all of the operating  management employed
by us or our subsidiaries was 3.7%.

     Bonuses.  Operating  earnings  bonus awards under our  Share-in-Performance
Plan constitute a significant  portion of the potential annual cash compensation
for Messrs.  Fiand, Maas and Weaver. Based on the business plan for the year and
management's  recommendation,  in February 2005, our management  development and
compensation  committee set our 2005 year-end  operating earnings goals at three
levels: a threshold level, which is the minimum operating earnings level for any
award to be made  under  the  Share-in-Performance  Plan,  a target  level and a
maximum level.  The chief  executive  officer,  with the assistance of our chief
operating  management  consultant  and chief  financial  officer,  selected  the
participants  in the Share-in  Performance  Plan and determined the bonus awards
for each  participant  that would be paid upon our  achievement of the operating
earnings  target  at  each  level.  A  participating  executive  officer's  cash
compensation is designed to result in below competitive  compensation  levels if
the minimum level is not achieved.

     Pursuant to the Share-in-Performance Plan, if operating earnings fall below
the minimum  level,  no operating  earnings bonus award is paid. For 2005, if we
were to achieve operating  earnings at 85% or higher of the target level but did
not achieve the target level, a participant would receive a reduced target level
annual operating  earnings bonus award,  reduced by the pro rata amount by which
the achieved  operating  earnings was less than the target level. As a result of
our achieving 2005  operating  earnings at the target level,  Messrs.  Fiand and
Maas received the operating  earnings  bonus awards set forth next to their name
for 2005 in the bonus  column of the  summary  compensation  table in this proxy
statement.

     In making  these  determinations  regarding  base  salaries  and  operating
earning bonus awards,  our management  development  and  compensation  committee
relied on their collective business experience and judgment.

Common Stock Based Compensation

     In 2005, our management development and compensation committee administered
matters regarding the common stock based compensation of our executive officers.
In 2005,  management did not recommend any common stock based compensation,  and
our management  development  and  compensation  committee did not grant any such
compensation  to any  executive  officers  other than annual stock grants to our
directors, including our chief executive officer and vice chairman of the board,
for their services as directors.  Our management  development  and  compensation
committee does not currently anticipate granting common stock based compensation
to anyone in 2006 other than these annual grants of stock to our directors.  See
"Compensation  of  Directors  and  Executive  Officers and Other  Information  -
Compensation of Directors."

Deductibility of Compensation

     Section 162(m) of the Internal  Revenue Code of 1986 generally  disallows a
tax deduction to public companies for  non-performance  based  compensation over
$1.0 million paid to the company's chief  executive  officer and four other most
highly compensated executive officers. It is our general policy to structure the
performance-based  portion of the  compensation  of our executive  officers in a
manner that enhances our ability to deduct fully such compensation.

     The following individuals,  in the capacities indicated,  hereby submit the
foregoing report.


                                                     
R. Gerald Turner              Keith R. Coogan              George E. Poston
Chairman of our Management    Member of our Management     Member of our Management
Development and               Development and Compensation Development and Compensation
Compensation Committee        Committee                    Committee



                     CERTAIN RELATIONSHIPS AND TRANSACTIONS

     Relationships   with  Related   Parties.   As  set  forth  under  "Security
Ownership," Harold C. Simmons,  through Contran, may be deemed to control us. We
and other  entities  that may be deemed to be  controlled  by or  related to Mr.
Simmons sometimes engage in the following:

o    intercorporate  transactions,  such as  guarantees,  management and expense
     sharing  arrangements,  shared fee  arrangements,  tax sharing  agreements,
     joint ventures,  partnerships,  loans,  options,  advances of funds on open
     account and sales,  leases and  exchanges of assets,  including  securities
     issued by both related and unrelated parties; and

o    common  investment  and  acquisition  strategies,   business  combinations,
     reorganizations,  recapitalizations,  securities  repurchases and purchases
     and sales  (and  other  acquisitions  and  dispositions)  of  subsidiaries,
     divisions or other business units,  which  transactions  have involved both
     related and unrelated parties and have included  transactions that resulted
     in the  acquisition  by one related party of an equity  interest in another
     related party.

     We periodically  consider,  review and evaluate and understand that Contran
and  related   entities   periodically   consider,   review  and  evaluate  such
transactions.  Depending  upon  the  business,  tax and  other  objectives  then
relevant and restrictions under indentures and other agreements,  it is possible
that we might be a party to one or more of such  transactions in the future.  In
connection with these  activities,  we may consider  issuing  additional  equity
securities or incurring additional indebtedness. Our acquisition activities have
in the  past and may in the  future  include  participation  in  acquisition  or
restructuring  activities  conducted by other companies that may be deemed to be
related to Harold C. Simmons.  It is our policy to engage in  transactions  with
related parties on terms, in our opinion,  no less favorable to us than could be
obtained from unrelated parties.

     Certain directors or executive officers of Contran,  CompX,  Keystone,  NL,
TIMET  or  Valhi  also  serve  as our  directors  or  executive  officers.  Such
relationships  may  lead to  possible  conflicts  of  interest.  These  possible
conflicts  of  interest  may arise from the  duties of  loyalty  owed by persons
acting as corporate  fiduciaries to two or more companies under circumstances in
which such companies may have adverse interests.  No specific  procedures are in
place  that  govern  the  treatment  of  transactions  among us and our  related
entities,   although  such  entities  may  implement   specific   procedures  as
appropriate  for  particular   transactions.   In  addition,   under  applicable
principles  of law, in the absence of  stockholder  ratification  or approval by
directors  who may be deemed  disinterested,  transactions  involving  contracts
among  companies  under common  control must be fair to all companies  involved.
Furthermore,  directors owe  fiduciary  duties of good faith and fair dealing to
all stockholders of the companies for which they serve.

     Intercorporate  Services Agreements.  We and certain related companies have
entered  into ISAs.  Under the ISAs,  employees of one company  provide  certain
services,  including  executive officer services,  to the other company on a fee
basis. The services rendered under the ISAs may include  executive,  management,
financial,  internal audit, accounting,  tax, legal, insurance, risk management,
treasury,  aviation,  human resources,  technical,  consulting,  administrative,
office,  occupancy  and  other  services  as  required  from time to time in the
ordinary course of the recipient's business.  The fees paid pursuant to the ISAs
are  generally  based upon an estimate of the time  devoted by  employees of the
provider of the services to the affairs of the recipient and the employer's cost
related to such employees,  which includes the employees' cash  compensation and
an overhead component that takes into account the employer's other costs related
to the  employees.  Each  of  the  ISAs  in  their  current  form  extends  on a
quarter-to-quarter  basis,  generally subject to the termination by either party
pursuant to a written  notice  delivered  30 days prior to the start of the next
quarter.  Because of the large number of companies related to Contran and us, we
believe we benefit from cost savings and economies of scale gained by not having
certain  management,  financial  and  administrative  staffs  duplicated at each
entity,  thus  allowing  certain  individuals  to provide  services  to multiple
companies but only be compensated by one entity. With respect to a publicly held
company  that is a party to an ISA,  the ISA and the  related  aggregate  annual
charge is approved by the independent directors of the company after receiving a
recommendation  from  the  company's  management  development  and  compensation
committee.

     In 2005,  we paid Contran  fees of $5.7 million for its services  under the
ISA  between  Contran  and us. In 2006,  we expect to pay  Contran  fees of $6.3
million for its services  under this ISA. We also pay director fees and expenses
directly to Messrs.  Harold and Glenn  Simmons and Watson for their  services as
our directors.

     Short-Swing Trading Profits. From December 2004 through April 2005, NL sold
shares of our common  stock in the open market.  From June 2004 through  October
2005, Valhi purchased shares of our common stock in the open market. Pursuant to
section  16(b)  of the  Securities  Exchange  Act,  certain  of such  sales  and
purchases  might be deemed to be matched for purposes of  computing  short-swing
profits.  As a result,  Valhi made several voluntary payments to us concurrently
with a potentially matching transaction  aggregating  approximately $600,000 and
$1.2  million  for 2004 and 2005,  respectively,  which  amounts  represent  the
maximum  amount  of  any  possible  short-swing  profits  resulting  from  these
transactions.

     Loans between Related  Parties.  From time to time,  loans and advances are
made between us and various related  parties  pursuant to term and demand notes.
These  loans and  advances  are entered  into  principally  for cash  management
purposes. When we loan funds to related parties, the lender is generally able to
earn a higher rate of return on the loan than the lender would earn if the funds
were  invested  in other  instruments.  While  certain of such loans may be of a
lesser credit quality than cash equivalent  instruments  otherwise  available to
us, we believe that we have evaluated the credit risks involved,  and that those
risks are reasonable and reflected in the terms of the applicable loans. When we
borrow  from  related  parties,  we are  generally  able to pay a lower  rate of
interest than we would pay if we borrowed from unrelated parties.

     During 2005,  we did not borrow from,  or lend to,  unconsolidated  related
parties.  Accordingly, we received no interest income on loans to unconsolidated
related  parties  and paid no  interest  on loans  from  unconsolidated  related
parties in 2005.

     Insurance Matters. We and Contran participate in a combined risk management
program.  Pursuant to the program,  Contran and certain of its  subsidiaries and
related  entities,  including  us and  certain of our  subsidiaries  and related
entities,  purchase  certain of their  insurance  policies as a group,  with the
costs of the jointly owned policies being  apportioned  among the  participating
companies.  Tall Pines and EWI RE, Inc.  provide for or broker  these  insurance
policies.  Tall Pines is a captive  insurance company wholly owned by Valhi, and
EWI RE, Inc. is a reinsurance brokerage and risk management firm wholly owned by
NL. Consistent with insurance  industry  practices,  Tall Pines and EWI RE, Inc.
receive commissions from insurance and reinsurance underwriters for the policies
that they provide or broker.

     With respect to certain of such jointly  owned  insurance  policies,  it is
possible that unusually  large losses  incurred by one or more insureds during a
given  policy  period  could  leave the other  participating  companies  without
adequate  coverage under that policy for the balance of the policy period.  As a
result, Contran and certain of its subsidiaries or related companies,  including
us, have entered into a loss sharing agreement under which any uninsured loss is
shared by those companies who have submitted  claims under the relevant  policy.
We believe the  benefits in the form of reduced  premiums  and broader  coverage
associated  with  the  group  coverage  for  such  policies  justify  the  risks
associated with the potential for any uninsured loss.

     During 2005, we paid premiums of  approximately  $7.7 million for insurance
policies Tall Pines provided or EWI RE, Inc. brokered,  including  approximately
$1.3 million paid by Louisiana  Pigment Company,  L.P., a partnership of which a
wholly owned  subsidiary  of ours and a subsidiary of Huntsman LLC each own 50%.
These  amounts  principally  included  payments for  reinsurance  and  insurance
premiums paid to unrelated third parties,  but also included commissions paid to
Tall Pines and EWI RE, Inc. Tall Pines purchases  reinsurance for  substantially
all of the risks it  underwrites.  In our  opinion,  the  amounts  that we,  our
subsidiaries  and  Louisiana  Pigment  Company,  L.P.  paid for these  insurance
policies  and the  allocation  among us and our  related  entities  of  relative
insurance  premiums are reasonable and at least as favorable to those we or they
could have obtained through unrelated  insurance companies or brokers. We expect
that these relationships with Tall Pines and EWI RE, Inc. will continue in 2006.

     Tax  Matters.  We  and  our  qualifying  subsidiaries  are  members  of the
consolidated  U.S.  federal tax return of which  Contran is the parent  company,
which we refer to as the  "Contran  Tax  Group." As a member of the  Contran Tax
Group and  pursuant to certain tax sharing  agreements,  each of the members and
its  qualifying  subsidiaries  compute  provisions  for U.S.  income  taxes on a
separate company basis using tax elections made by Contran.  Pursuant to the tax
sharing agreements and using tax elections made by Contran,  each of the parties
makes payments or receives payments in amounts it would have paid to or received
from the U.S.  Internal  Revenue Service had it not been a member of the Contran
Tax Group but  instead  had been a  separate  taxpayer.  Refunds  are  generally
limited to amounts  previously paid under the respective tax sharing  agreement.
We and our qualifying  subsidiaries  are also a part of consolidated tax returns
filed  by  Contran  in  certain  U.S.  state  jurisdictions.  The  terms  of the
applicable  tax  sharing  agreements  also  apply  to  state  payments  to these
jurisdictions.

     Under  applicable law, we, as well as every other member of the Contran Tax
Group,  are each jointly and severally  liable for the aggregate  federal income
tax liability of Contran and the other  companies  included in the group for all
periods in which we are  included in the group.  Valhi has agreed,  however,  to
indemnify  us for any  liability  for income  taxes of the  Contran Tax Group in
excess of our tax  liability  previously  computed and paid by us in  accordance
with the tax allocation policy.

     Under certain circumstances, tax regulations could require Contran to treat
items  differently  than we would have treated  them on a stand alone basis.  In
such instances, accounting principles generally accepted in the United States of
America require us to conform to Contran's tax elections.  In 2005,  pursuant to
our tax sharing  agreement with Valhi and Contran,  we paid Valhi  approximately
$7.7 million in cash.

     Titanium Dioxide  Purchases.  From time to time,  TIMET purchases  titanium
dioxide  from us.  Such  purchases  are made at  prevailing  market  prices  for
titanium dioxide and on an individual purchase order basis. During 2005, TIMET's
purchases of titanium dioxide from us were at a cost of approximately $114,600.

     Simmons  Family  Matters.  Certain  family  members of our  chairman of the
board, Harold C. Simmons,  provide services to us and our subsidiaries  pursuant
to the ISA between us and Contran.  In 2005,  James C. Epstein,  our  chairman's
son-in-law,  provided  risk  management  services  to us  and  our  subsidiaries
pursuant to this ISA.  The portion of the fees we and our  subsidiaries  paid to
Contran  in 2005  pursuant  to this  ISA for the  services  of Mr.  Epstein  was
$87,700. We and our subsidiaries expect to pay Contran similar amounts for these
services in 2006.  Mr.  Glenn R.  Simmons,  the  brother of our  chairman of the
board, also received aggregate compensation of approximately $38,400 in cash and
stock from us for his  services  as our  director  for 2005 and is  expected  to
continue to receive similar compensation for 2006.

                                PERFORMANCE GRAPH

     Set  forth  below  is a line  graph  comparing  the  yearly  change  in the
cumulative total  stockholder  return on our common stock against the cumulative
total  return  of the  S&P  500  Composite  Stock  Price  Index  and the S&P 500
Diversified  Chemicals  Index for the period  commencing  December  8, 2003 (the
initial date our common stock traded publicly) and ending December 31, 2005. The
graph  shows  the  value  at  December  31 of each  year  assuming  an  original
investment of $100 and the reinvestment of dividends.

   Comparison of Cumulative Return among Kronos Worldwide, Inc. Common Stock,
          the S&P 500 Index and the S&P 500 Diversified Chemicals Index

[Graph Omitted]



                                                 December 8,       December 31,      December 31,      December 31,
                                                    2003               2003              2004              2005
                                                ------------       ------------     -------------     -------------

                                                                                              
Kronos Worldwide, Inc.....................          $100              $129              $243              $179

S&P 500 Composite Stock Price Index.......           100               104               115               121

S&P 500 Diversified Chemicals Index.......           100               105               122               110



                             AUDIT COMMITTEE REPORT

     Our  audit  committee  of the  board  of  directors  is  comprised  of four
directors and operates under a written  amended and restated  charter adopted by
the board of directors. All members of our audit committee meet the independence
standards  established by the board of directors and the NYSE and promulgated by
the SEC under the  Sarbanes-Oxley  Act of 2002.  The amended and restated  audit
committee  charter  is  attached  as  Exhibit  A to this  statement  and is also
available on our website at  www.kronostio2.com  under the corporate  governance
section.

     Our  management  is  responsible  for,  among other  things,  preparing its
consolidated  financial  statements in  accordance  with  accounting  principles
generally accepted in the United States of America, or "GAAP,"  establishing and
maintaining  internal control over financial reporting (as defined in Securities
Exchange Act Rule 13a-15(f)) and evaluating the  effectiveness  of such internal
control over financial reporting.  Our independent  registered public accounting
firm is  responsible  for  auditing our  consolidated  financial  statements  in
accordance with the standards of the Public Company  Accounting  Oversight Board
(United States) and for expressing an opinion on the conformity of the financial
statements with GAAP. Our independent  registered public accounting firm is also
responsible  for  auditing  our internal  control  over  financial  reporting in
accordance with such standards and for expressing an opinion on (i) management's
assessment of the effectiveness of its internal control over financial reporting
and (ii) the effectiveness of its internal control over financial reporting. Our
audit committee assists the board of directors in fulfilling its  responsibility
to oversee  management's  implementation of our financial  reporting process. In
its  oversight  role,  our audit  committee  reviewed and  discussed the audited
financial  statements with  management and with PwC, our independent  registered
public accounting firm for 2005. Our audit committee also reviewed and discussed
internal control over financial reporting with management and with PwC.

     Our  audit   committee  met  with  PwC  and  discussed  any  issues  deemed
significant by our independent  registered public accounting firm, including the
required  matters to be discussed by  Statement  of Auditing  Standards  No. 61,
Communication  with Audit Committee,  as amended.  PwC has provided to our audit
committee written disclosures and the letter required by Independence  Standards
Board No. 1,  Independence  Discussions  with  Audit  Committees,  and our audit
committee discussed with PwC that firm's independence.  Our audit committee also
concluded  that PwC's  provision  of  non-audit  services  to us and our related
entities is compatible with PwC's independence.

     Based upon the foregoing considerations, our audit committee recommended to
the board of directors that our audited financial  statements be included in our
2005 Annual Report on Form 10-K for filing with the SEC.

     Members  of our  audit  committee  of the board of  directors  respectfully
submit the foregoing report.

      Cecil H. Moore, Jr.                     George E. Poston
      Chairman of our Audit Committee         Member of our Audit Committee

      Keith R. Coogan                         R. Gerald Turner
      Member of our Audit Committee           Member of our Audit Committee



              INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM MATTERS

     Independent   Registered   Public   Accounting  Firm.  PwC  served  as  our
independent  registered  public  accounting firm for the year ended December 31,
2005.  Our audit  committee has appointed PwC to review our quarterly  unaudited
consolidated  financial  statements to be included in our  Quarterly  Reports on
Form 10-Q for the first three quarters of 2006. We expect PwC will be considered
for  appointment  to audit our  annual  consolidated  financial  statements  and
internal control over financial reporting for the year ending December 31, 2006.
Representatives of PwC are not expected to attend the annual meeting.

     Fees Paid to  PricewaterhouseCoopers  LLP.  The  following  table shows the
aggregate fees that our audit  committee has authorized and PwC has billed or is
expected to bill to us for services rendered for 2004 and 2005. Additional audit
fees for 2005 may  subsequently be authorized and paid to PwC, in which case the
amounts  disclosed  below for fees  paid to PwC for 2005  would be  adjusted  to
reflect such additional  payments in our proxy statement relating to next year's
annual stockholder  meeting. In this regard, the audit fees shown below for 2004
have been adjusted from amounts disclosed in our proxy statement for last year's
annual stockholder meeting.


             Type of Fees                    2004           2005
- -------------------------------------    -------------  --------------

                                                  
Audit Fees (1).......................    $  2,241,259   $  1,960,000
Audit-Related Fees (2)...............          20,236         19,000
Tax Fees (3).........................          51,735         24,100
All Other Fees.......................             -0-            -0-
                                         ------------   ------------

Total................................    $  2,313,230   $  2,003,100
                                         ============   ============

- ----------

(1)  Fees for the following services:

     (a)  audits of consolidated year-end financial statements for each year and
          audit of internal control over financial reporting;
     (b)  reviews of the unaudited quarterly financial  statements  appearing in
          Forms 10-Q for each of the first three quarters of each year;
     (c)  consents and assistance with  registration  statements  filed with the
          SEC; and
     (d)  normally provided  statutory or regulatory  filings or engagements for
          each year.

(2)  Fees for assurance and related services  reasonably related to the audit or
     review of  financial  statements  for each year.  These  services  included
     employee benefit plan audits,  accounting consultations and attest services
     concerning   financial   accounting  and  reporting  standards  and  advice
     concerning internal controls.

(3)  Permitted fees for tax compliance, tax advice and tax planning services.

     Preapproval  Policies and  Procedures.  For the purpose of maintaining  the
independence of our independent  registered  public  accounting  firm, our audit
committee has adopted  policies and procedures for the  preapproval of audit and
permitted non-audit services the firm provides to us or any of our subsidiaries.
We may not engage the firm to render any audit or  permitted  non-audit  service
unless the service is approved in advance by our audit committee pursuant to the
committee's  amended and restated  preapproval  policies and procedures that the
committee approved on February 17, 2005. Pursuant to the policy:

o    the  committee  must  specifically  preapprove,  among  other  things,  the
     engagement of our independent  registered public accounting firm for audits
     and quarterly reviews of our financial statements, services associated with
     certain regulatory filings, including the filing of registration statements
     with the SEC, and services associated with potential business  acquisitions
     and dispositions involving us; and

o    for certain  categories of permitted  non-audit services of our independent
     registered  public  accounting firm, the committee may preapprove limits on
     the aggregate  fees in any calendar year without  specific  approval of the
     service.

These permitted non-audit services include:

o    audit  services,   such  as  certain  consultations   regarding  accounting
     treatments or  interpretations  and assistance in responding to certain SEC
     comment letters;

o    audit-related  services,  such as  certain  other  consultations  regarding
     accounting treatments or interpretations, employee benefit plan audits, due
     diligence and control reviews;

o    tax services,  such as tax compliance  and  consulting,  transfer  pricing,
     customs and duties and expatriate tax services; and

o    other  permitted  non-audit  services,  such as assistance  with  corporate
     governance  matters  and  filing  documents  in foreign  jurisdictions  not
     involving the practice of law.

     Pursuant to the  policy,  our audit  committee  has  delegated  preapproval
authority to the  chairman of the  committee or his designee to approve any fees
in excess of the annual  preapproved  limits for these  categories  of permitted
non-audit  services  provided by our independent  registered  public  accounting
firm.  The  chairman  must report any action  taken  pursuant to this  delegated
authority at the next meeting of the committee.

     For 2005 our audit committee  preapproved all PwC's services provided to us
or  any of  our  subsidiaries  in  compliance  with  the  amended  and  restated
preapproval  policies  and  procedures  without  the use of the SEC's de minimis
exception to such preapproval requirement.

                                  OTHER MATTERS

     The board of directors  knows of no other  business  that will be presented
for consideration at the meeting.  If any other matters properly come before the
meeting,  the persons  designated as agents in the enclosed proxy card or voting
instruction  form will vote on such matters in accordance with their  reasonable
judgment.

   STOCKHOLDER PROPOSALS AND DIRECTOR NOMINATIONS FOR THE 2007 ANNUAL MEETING

     Stockholders  may submit  proposals on matters  appropriate for stockholder
action at our annual stockholder meetings,  consistent with rules adopted by the
SEC. We must  receive  such  proposals  not later than  December  14, 2006 to be
considered for inclusion in the proxy  statement and form of proxy card relating
to the annual  meeting of  stockholders  in 2007.  Our bylaws  require  that the
proposal  must  set  forth a brief  description  of the  proposal,  the name and
address of the proposing  stockholder as they appear on our books, the number of
shares of our common stock the stockholder  holds and any material  interest the
stockholder has in the proposal.

     The board of directors will consider the director  nominee  recommendations
of our stockholders. Our bylaws require that a nomination set forth the name and
address of the nominating  stockholder,  a  representation  that the stockholder
will be a  stockholder  of record  entitled  to vote at the  annual  stockholder
meeting  and  intends to appear in person or by proxy at the meeting to nominate
the nominee,  a description of all  arrangements or  understandings  between the
stockholder  and the nominee (or other persons  pursuant to which the nomination
is to be  made),  such  other  information  regarding  the  nominee  as would be
required to be included in a proxy  statement  filed pursuant to the proxy rules
of the SEC and the consent of the nominee to serve as a director if elected.

     The board of directors has no specific minimum  qualifications for director
candidates.  The board of directors will consider a potential director nominee's
ability to satisfy the need, if any, for any required  expertise on the board of
directors or one of its committees. Historically, our management has recommended
director  nominees to the board of  directors.  Because  under the NYSE  listing
standards  we may be deemed to be a controlled  company,  the board of directors
believes that additional policies or procedures with regard to the consideration
of director candidates recommended by its stockholders are not appropriate.

     For  proposals  or  director  nominations  to be brought at the 2007 annual
meeting  of  stockholders  but not  included  in the  proxy  statement  for such
meeting, our bylaws require that the proposal or nomination must be delivered or
mailed to our principal  executive  offices in most cases no later than February
27, 2007. Proposals and nominations should be addressed to: Corporate Secretary,
Kronos  Worldwide,  Inc.,  Three Lincoln Centre,  5430 LBJ Freeway,  Suite 1700,
Dallas, Texas 75240-2697.

                   COMMUNICATIONS WITH THE BOARD OF DIRECTORS

     Stockholders and other interested  parties who wish to communicate with the
board  of  directors  or its  non-management  directors  may do so  through  the
following  procedures.  Such communications not involving complaints or concerns
regarding accounting,  internal accounting controls and auditing matters related
to us may be  sent  to  the  attention  of our  corporate  secretary  at  Kronos
Worldwide,  Inc., Three Lincoln Centre,  5430 LBJ Freeway,  Suite 1700,  Dallas,
Texas 75240-2697.  Provided that any such communication  relates to our business
or  affairs  and is  within  the  function  of our  board  of  directors  or its
committees,  and does not relate to insignificant or inappropriate matters, such
communications,  or summaries of such  communications,  will be forwarded to the
chairman of our audit  committee,  who also serves as the presiding  director of
our non-management and independent director meetings.

     Complaints or concerns regarding  accounting,  internal accounting controls
and  auditing  matters,  which  may be made  anonymously,  should be sent to the
attention of our general counsel with a copy to our chief  financial  officer at
the same address as our corporate  secretary.  These complaints or concerns will
be  forwarded  to the  chairman  of our  audit  committee.  We will  keep  these
complaints  or concerns  confidential  and  anonymous,  to the extent  feasible,
subject to applicable law. Information  contained in such a complaint or concern
may be  summarized,  abstracted  and  aggregated  for  purposes of analysis  and
investigation.

                         2005 ANNUAL REPORT ON FORM 10-K

     A copy of our Annual Report on Form 10-K for the fiscal year ended December
31,  2005 is included as part of the annual  report  mailed to our  stockholders
with  this  proxy  statement  and  may  also  be  accessed  on  our  website  at
www.kronostio2.com.

                                ADDITIONAL COPIES

     Pursuant to an SEC rule concerning the delivery of annual reports and proxy
statements,  a single set of these  documents  may be sent to any  household  at
which two or more  stockholders  reside if they appear to be members of the same
family.  Each  stockholder  continues  to receive a separate  proxy  card.  This
procedure,  referred  to  as  householding,  reduces  the  volume  of  duplicate
information  stockholders  receive and reduces mailing and printing expenses.  A
number of  brokerage  firms have  instituted  householding.  Certain  beneficial
stockholders who share a single address may have received a notice that only one
annual  report  and  proxy  statement  would  be sent to that  address  unless a
stockholder  at that  address  gave  contrary  instructions.  If, at any time, a
stockholder who holds shares through a broker no longer wishes to participate in
householding  and would prefer to receive a separate proxy statement and related
materials,  or if such  stockholder  currently  receives  multiple copies of the
proxy  statement  and related  materials at his or her address and would like to
request householding of our communications, the stockholder should notify his or
her broker.  Additionally,  we will promptly deliver a separate copy of our 2005
annual report or this proxy  statement to any stockholder at a shared address to
which a single copy of such  documents was  delivered,  upon the written or oral
request of the stockholder.

     To obtain copies of our 2005 annual report or this proxy statement  without
charge, please mail your request to the attention of Robert D. Graham, corporate
secretary,  at Kronos Worldwide,  Inc., Three Lincoln Centre,  5430 LBJ Freeway,
Suite 1700, Dallas, Texas 75240-2697, or call him at 972.233.1700.

                                                 Kronos Worldwide, Inc.




                                                 Dallas, Texas
                                                 April 13, 2006







                                   Appendix A

                             Kronos Worldwide, Inc.

                             Audit Committee Charter

                       Amended and Restated June 30, 2005

                                 --------------

                                   ARTICLE I.
                                     PURPOSE

     The   audit   committee   assists   the  board  of   directors'   oversight
responsibilities  relating to the financial  accounting and reporting  processes
and auditing  processes of the corporation.  The audit committee shall assist in
the oversight of:

     -    the integrity of the corporation's  financial  statements and internal
          control over financial reporting;

     -    the corporation's compliance with legal and regulatory requirements;

     -    the independent auditor's qualifications and independence; and

     -    the  performance  of the  corporation's  internal  audit  function and
          independent auditor.

                                   ARTICLE II.
    RELATIONSHIP WITH THE CORPORATION, MANAGEMENT AND THE INDEPENDENT AUDITOR

     Management  is  responsible  for  preparing  the  corporation's   financial
statements  and  maintaining  internal  control over  financial  reporting.  The
corporation's  independent auditor is responsible for auditing the corporation's
financial  statements  and  internal  control  over  financial  reporting.   The
activities  of the audit  committee are in no way designed to supersede or alter
these traditional  responsibilities.  The corporation's  independent auditor and
management  have  more  time,  knowledge  and  detailed  information  about  the
corporation  than  do  the  audit  committee  members.  Accordingly,  the  audit
committee's  role does not  provide any  special  assurances  with regard to the
corporation's financial statements or internal control over financial reporting.
Each member of the audit committee,  in the performance of such member's duties,
will be entitled to rely in good faith upon the information,  opinions,  reports
or  statements  presented  to the audit  committee  by any of the  corporation's
officers,  employees,  agents, counsel, experts, auditors or any other person as
to matters  such  member  reasonably  believes  are within  such other  person's
professional or expert competence and who has been selected with reasonable care
by or on behalf of the corporation, and nothing in this charter will, or will be
deemed to,  decrease or modify in any manner  adverse to any member of the audit
committee such member's right to rely on such information,  opinions, reports or
statements.

     Nothing in this charter will, or will be deemed to, adversely affect in any
manner the rights of members of the committee to indemnification and advancement
of expenses under the  corporation's  certificate of incorporation or bylaws, or
under any contract,  agreement,  arrangement or  understanding  that may benefit
such member. In addition,  notwithstanding  any other provision of this charter,
no provision of this charter will,  except to the extent  required by applicable
law,  rule or  regulation,  be  construed  to  create  any  duty,  liability  or
obligation on the part of the committee or any of its members.

                                  ARTICLE III.
                             AUTHORITY AND RESOURCES

     The audit  committee  shall have the authority  and resources  necessary or
appropriate  to discharge its  responsibilities.  The audit  committee  shall be
provided with full access to all books, records, facilities and personnel of the
corporation in carrying out its duties.  The audit committee shall have the sole
authority with regard to the independent  auditor as set forth in Article V, and
the authority to engage independent counsel and other advisors, as it determines
is necessary to carry out its duties. The corporation shall provide  appropriate
funding,  as the audit  committee  determines  is  necessary or  appropriate  in
carrying  out its  duties,  for the  committee  to  engage  and  compensate  the
independent auditor or legal counsel or other advisors to the committee,  and to
pay the committee's ordinary administrative expenses.

                                   ARTICLE IV.
                            COMPOSITION AND MEETINGS

     The board of  directors  shall set the number of directors  comprising  the
audit  committee  from time to time,  which number shall not be less than three.
The board of directors shall designate a chairperson of the audit committee. The
number of directors comprising the audit committee and the qualifications, which
members  will  all be  financially  literate  with at least  one  being an audit
committee  financial  expert,  and  independence  of each  member  of the  audit
committee shall at all times satisfy all applicable requirements, regulations or
laws,  including,  without  limitation,  the rules of any  exchange  or national
securities association on which the corporation's securities trade. Simultaneous
service  on more than  three  non-affiliated  public  company  audit  committees
requires a special  determination  by the board of  directors  and, if required,
disclosure  in  the  annual  proxy  statement.  The  board  of  directors  shall
determine, in its business judgment,  whether the members of the audit committee
satisfy all such requirements, regulations or laws.

     The audit  committee  shall meet at least  quarterly  and as  circumstances
dictate.  Regular  meetings of the audit  committee  may be held with or without
prior  notice  at such  time and at such  place as  shall  from  time to time be
determined by the chairperson of the audit committee,  any of the  corporation's
executive officers or the secretary of the corporation.  Special meetings of the
audit  committee  may be called by or at the  request of any member of the audit
committee,  any of the corporation's  executive  officers,  the secretary of the
corporation or the  independent  auditor,  in each case on at least  twenty-four
hours notice to each member.

     A majority of the audit committee members shall constitute a quorum for the
transaction of the audit  committee's  business.  The audit  committee shall act
upon the vote of a majority of its  members at a duly called  meeting at which a
quorum is present.  Any action of the audit  committee may be taken by a written
instrument signed by all of the members of the audit committee.  Meetings of the
audit committee may be held at such place or places as the audit committee shall
determine or as may be specified or fixed in the respective  notice or waiver of
notice for a meeting.  Members of the audit  committee may  participate in audit
committee proceedings by means of conference telephone or similar communications
equipment by means of which all persons  participating  in the  proceedings  can
hear each other, and such participation  shall constitute  presence in person at
such proceedings.

     The audit committee may invite to its meetings any director,  any member of
management  of the  corporation  and any other persons it deems  appropriate  in
order to carry out its  responsibilities.  The audit  committee may also exclude
from its  meetings  any persons it deems  appropriate  in order to carry out its
responsibilities.

                                   ARTICLE V.
                                RESPONSIBILITIES

     To fulfill its  responsibilities,  the audit  committee  shall  perform the
following activities.

Financial Statements and Disclosures

     o    Review  and  discuss  the   corporation's   annual  audited  financial
          statements  and  quarterly   unaudited   financial   statements   with
          management and the independent auditor, and the corporation's  related
          disclosure  under  "Management's  Discussion and Analysis of Financial
          Condition and Results of Operations" prior to the annual and quarterly
          financial  statements being filed in the corporation's  Forms 10-K and
          Forms 10-Q, as applicable.

     o    Review and discuss the  corporation's  internal control over financial
          reporting with management and the independent  auditor,  including the
          corporation's  annual audited  management  report on internal  control
          over financial  reporting,  and the corporation's  related  disclosure
          under "Disclosure Controls and Procedures."

     o    Ascertain from officers signing  certifications  whether there existed
          any fraud or any significant  deficiencies  or material  weaknesses in
          the corporation's internal control over financial reporting.

     o    Recommend to the board of directors, if appropriate,  that the audited
          financial statements be included in the corporation's Annual Report on
          Form  10-K  to  be  filed  with  the  U.S.   Securities  and  Exchange
          Commission.

     ?    Generally  discuss  (i.e., a discussion of the types of information to
          be disclosed and the type of  presentation to be made) with management
          and the independent  auditor, as appropriate,  earnings press releases
          and financial  information and earnings  guidance provided to analysts
          and rating  agencies.  The audit committee need not discuss in advance
          each earnings  release or each instance in which the  corporation  may
          provide earnings guidance.

     o    Prepare  such  reports of the audit  committee  for the  corporation's
          public disclosure documents as applicable requirements, regulations or
          laws may require from time to time, which includes the audit committee
          report as required by the U.S.  Securities and Exchange  Commission to
          be included in the corporation's annual proxy statement.

     o    Review significant accounting, reporting or auditing issues, including
          recent   professional  and  regulatory   pronouncements   or  proposed
          pronouncements,  and  understand  their  impact  on the  corporation's
          financial statements and internal control over financial reporting.

Independent Auditor

     o    Appoint,  compensate,  retain and oversee (including the resolution of
          disagreements between management and the independent auditor regarding
          financial reporting or internal control over financial  reporting) the
          work of any  independent  auditor engaged for the purpose of preparing
          or issuing an audit report or performing other audit, review or attest
          services for the corporation.

     o    Provide  that the  independent  auditor  report  directly to the audit
          committee.

     o    Annually review the  qualifications,  independence  and performance of
          the independent auditor, including an evaluation of the lead partner

     o    Receive such reports and communications  from the independent  auditor
          and take such actions as are required by auditing standards  generally
          accepted in the United States of America or  applicable  requirements,
          regulations  or  laws,  including,  to the  extent  so  required,  the
          following:

          o    prior  to the  annual  audit,  review  with  management  and  the
               independent  auditor the scope and approach of the annual  audits
               of the  corporation's  financial  statements and internal control
               over financial reporting;

          o    review any changes in the independent  auditor's scope during the
               audit, and after the annual audit, review with management and the
               independent  auditor  the  independent  auditor's  reports on the
               results of the annual audit;

          o    review  with  the  independent  auditor  any  audit  problems  or
               difficulties and management's response;

          o    review  with the  independent  auditor  prior to filing the audit
               report  with the U.S.  Securities  and  Exchange  Commission  the
               matters  required to be discussed by the  Statement on Accounting
               Standards 61, as amended, supplemented or superseded; and

          o    at least annually,  obtain and review a report by the independent
               auditor describing:

               o    the   independent   auditor's   internal   quality   control
                    procedures;

               o    any  material  issues  raised  by the most  recent  internal
                    quality control review,  or peer review,  of the independent
                    auditor or by any inquiry or  investigation  by governmental
                    or  professional  authorities,  within  the  preceding  five
                    years,  with  respect  to one  or  more  independent  audits
                    carried out by the independent  auditor, and any steps taken
                    to deal with any such issues; and

               o    all  relationships  between the independent  auditor and the
                    corporation  in order to assess the auditor's  independence,
                    including the written  disclosures  required by Independence
                    Standards  Board  Standard No. 1,  Independence  Discussions
                    with  Audit   Committees,   as  amended,   supplemented   or
                    superseded.

     o    Establish   preapproval   policies  and   procedures   for  audit  and
          permissible  non-audit  services provided by the independent  auditor.
          The audit committee shall be responsible for the preapproval of all of
          the  independent  auditor's  engagement fees and terms, as well as all
          permissible  non-audit  engagements  of the  independent  auditor,  as
          required by applicable  requirements,  regulations  or laws. The audit
          committee  may  delegate  to  one  or  more  of its  members  who  are
          independent  directors  the  authority  to  grant  such  preapprovals,
          provided  the  decisions  of any  such  member  to whom  authority  is
          delegated  shall be presented to the full audit  committee at its next
          scheduled meeting.

     o    Set clear  hiring  policies for  employees or former  employees of the
          independent auditor.

     o    Ensure  that  significant  findings  and  recommendations  made by the
          independent  auditor are received and discussed on a timely basis with
          the audit committee and management.

Other Responsibilities

     o    Discuss  periodically  with  management  the  corporation's   policies
          regarding risk assessment and risk management.

     o    Meet separately,  periodically, with management, the internal auditors
          (or other  personnel  responsible for the internal audit function) and
          the independent auditor.

     o    Establish  procedures  for the  receipt,  retention  and  treatment of
          complaints received by the corporation regarding accounting,  internal
          accounting controls or auditing matters,  including procedures for the
          confidential,  anonymous submission by employees of concerns regarding
          questionable accounting or auditing matters.

     o    Review  periodically  the reports and activities of the internal audit
          function and the  coordination of the internal audit function with the
          independent auditor.

     o    Conduct an annual evaluation of its own performance.

     o    Report   regularly  to  the  board  of  directors  on  its   oversight
          responsibilities set forth in Article I. The report may be made orally
          by the audit  committee  chairman or any other member of the committee
          designated by the committee chairman.

     o    Maintain  minutes or other  records of meetings and  activities of the
          audit committee.

     o    Review and reassess this charter periodically.  Report to the board of
          directors any suggested changes to this charter.

     o    Meet  periodically  with officers of the  corporation  responsible for
          legal and  regulatory  compliance by the  corporation.  On at least an
          annual  basis,  review with the  corporation's  tax  director  any tax
          matters  that could  have a  significant  impact on the  corporation's
          financial statements.

                                   ARTICLE VI.
                                  MISCELLANEOUS

     The audit  committee  may from time to time  perform  any other  activities
consistent  with  this  charter,  the  corporation's   charter  and  bylaws  and
applicable  requirements,  regulations  or laws,  as the audit  committee or the
board of directors deems necessary or appropriate.


                                      ADOPTED BY THE BOARD OF DIRECTORS OF
                                      KRONOS WORLDWIDE, INC. ON JUNE 30, 2005.




                                      /s/ Robert D. Graham
                                      -----------------------------------------
                                      Robert D. Graham, Secretary







                             Kronos Worldwide, Inc.
                              Three Lincoln Centre
                          5430 LBJ Freeway, Suite 1700
                            Dallas, Texas 75240-2697



- -----------------------------------------------------------------------------
Proxy - Kronos Worldwide, Inc.
- -----------------------------------------------------------------------------

  PROXY SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF KRONOS WORLDWIDE, INC.
         FOR THE ANNUAL MEETING OF STOCKHOLDERS TO BE HELD MAY 24, 2006

The undersigned hereby appoints Steven L. Watson, Robert D. Graham and A. Andrew
R. Louis, and each of them, proxy and attorney-in-fact for the undersigned, with
full power of  substitution,  to vote on behalf of the  undersigned  at the 2006
Annual Meeting of  Stockholders  (the  "Meeting") of Kronos  Worldwide,  Inc., a
Delaware  corporation  ("Kronos  Worldwide"),  to be held at Kronos  Worldwide's
corporate offices at Three Lincoln Centre, 5430 LBJ Freeway, Suite 1700, Dallas,
Texas on  Wednesday,  May 24,  2006,  at 10:00  a.m.  (local  time),  and at any
adjournment or postponement  of the Meeting,  all of the shares of common stock,
par value  $0.01 per  share,  of Kronos  Worldwide  standing  in the name of the
undersigned or that the undersigned may be entitled to vote on the proposals set
forth, and in the manner directed, on this proxy card.

       THIS PROXY MAY BE REVOKED AS SET FORTH IN THE PROXY STATEMENT THAT
                          ACCOMPANIED THIS PROXY CARD.

The proxies, if this card is properly executed, will vote in the manner directed
on this card. If no direction is made,  the proxies will vote "FOR" all nominees
named on the reverse  side of this card for  election as  directors  and, to the
extent  allowed by  applicable  law, in the  discretion of the proxies as to all
other matters that may properly come before the Meeting and any  adjournment  or
postponement thereof.

  PLEASE SIGN, DATE AND MAIL THIS PROXY CARD PROMPTLY IN THE ENCLOSED ENVELOPE.
                                SEE REVERSE SIDE.

Dear Stockholder:

Kronos  Worldwide,  Inc.  encourages you to take advantage of new and convenient
ways by which you can vote your shares. You can vote your shares  electronically
through the internet or by telephone.  This  eliminates  the need to return this
proxy card.

Your  electronic or telephonic  vote  authorizes  the agents named on this proxy
card to vote in the same manner as if you marked,  dated and returned this proxy
card. If you vote your shares electronically or telephonically, do not mail back
this proxy card.

                  Your vote is important. Thank you for voting.

Telephone and Internet Voting Instructions
You can vote by telephone OR internet! Available 24 hours a day 7 days a week!
Instead of mailing this proxy card,  you may choose on of the two voting methods
outlined below to vote.

To vote using the Telephone              To vote using the Internet
(within the U.S. and Canada)

- -    Call toll-free 1-800-652-VOTE        -    Go to the following web site:
     (8683) in the United States or            WWW.COMPUTERSHARE.COM/EXPRESSVOTE
     Canada any time on a touch tone
     telephone. There is NO CHARGE
     to you for thecall                   -    Enter the information requested
                                               on your computer screen and
- -    Follow the simple instructions            follow the simpleinstructions.
     provided by the recorded message.

  VALIDATION DETAILS ARE LOCATED ON THE FRONT OF THIS FORM IN THE COLORED BAR.

If you vote by  telephone  or the  internet,  please DO NOT mail back this proxy
card.

Proxies  submitted by telephone or the internet  must be received by 12:01 a.m.,
Central Time, on May 24, 2006.
THANK YOU FOR VOTING




Kronos Worldwide, Inc.


[Name]
[Address]


[  ]  Mark this box with an X if you  have made changes to your  name or address
      details above.

- -----------------------------------------------------------------------------
Annual Meeting Proxy Card
- -----------------------------------------------------------------------------
A.   Election of Directors

PLEASE REFER TO THE REVERSE SIDE FOR TELEPHONE AND INTERNET VOTING INSTRUCTIONS

1.   The board of directors recommends a vote FOR the listed nominees.

                                             For                     Withhold
01-Keith R. Coogan                          [  ]                       [  ]
02-Cecil H. Moore, Jr.                      [  ]                       [  ]
03-George E. Poston                         [  ]                       [  ]
04-Glenn R. Simmons                         [  ]                       [  ]
05-Harold C. Simmons                        [  ]                       [  ]
06-R. Gerald Turner                         [  ]                       [  ]
07-Steven L. Watson                         [  ]                       [  ]

B.   Other Matters

2.   In their  discretion,  the proxies are  authorized  to vote upon such other
     business as may  properly  come before the Meeting and any  adjournment  or
     postponement thereof.

C.   Authorized Signatures - Sign Here - This section must be completed for your
     instructions to be executed.

NOTE: Please  sign  exactly as the name that  appears  on this card.  Joint
      owners  should each sign.  When  signing  other than in an  individual
      capacity,  please fully describe such capacity.  Each signatory hereby
      revokes all proxies  heretofore  given to vote at said Meeting and any
      adjournment or postponement thereof.


Signature 1 -             Signature 2 -               Date (mm/dd/yyyy)
Please keep signature     Please keep signature
within box                within box


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