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

                                    FORM 8-K

                                 CURRENT REPORT

                Pursuant to Section 13 OR 15(d) of the Securities
                              Exchange Act of 1934

              Date of Report (Date of the earliest event reported)

                                   May 4, 2005
                            ------------------------

                             Kronos Worldwide, Inc.
             ------------------------------------------------------
             (Exact name of Registrant as specified in its charter)


       Delaware                  1-31763                  76-0294959
  -------------------      ------------------          -----------------
    (State or other            (Commission               (IRS Employer
    jurisdiction of            File Number)            Identification No.)
    incorporation)

 5430 LBJ Freeway, Suite 1700, Dallas, Texas              75240-2697
- ----------------------------------------------           ------------
 (Address of principal executive offices)                 (Zip Code)

               Registrant's telephone number, including area code
                                  (972)233-1700
                                 --------------

                   (Former name or former address, if changed
                              since last report.)

Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2):

[  ]   Written communications pursuant to Rule 425 under the Securities Act
       (17 CFR 230.425)

[  ]   Soliciting material pursuant to Rule  14a-12 under  the Exchange Act
       (17 CFR 240.14a-12)

[  ]   Pre-commencement communications pursuant  to Rule 14d-2(b) under the
       Exchange Act (17 CFR 240.14d-2(b))

[  ]   Pre-commencement communications  pursuant to Rule 13e-4(c) under the
       Exchange Act (17 CFR 240.13e-4(c))


Item 2.02 Results of Operations and Financial Condition. Item 7.01 Regulation FD Disclosure. Pursuant to Items 2.02 and 7.01 of this current report, the registrant hereby furnishes the information set forth in its press release issued on May 4, 2005, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference. The information, including the exhibit, the registrant furnishes in this report is not deemed "filed" for purposes of section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Registration statements or other documents filed with the Securities and Exchange Commission shall not incorporate this information by reference, except as otherwise expressly stated in such filing. Item 9.01 Financial Statements and Exhibits. (c) Exhibits. Item No. Exhibit Index --------- --------------------------------------------------------- 99.1 Press Release dated May 4, 2005 issued by the registrant.

SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. KRONOS WORLDWIDE, INC. (Registrant) By: /s/ Gregory M. Swalwell ---------------------------- Gregory M. Swalwell Vice President, Finance Date: May 5, 2005

INDEX TO EXHIBITS Exhibit No. Description - ----------- -------------------------------------------------- 99.1 Press Release dated May 4, 2005 issued by the registrant.

Kronos Worldwide, Inc.               Contact:  Gregory M. Swalwell
Three Lincoln Centre                           Vice President, Finance and Chief
5430 LBJ Freeway, Suite 1700                   Financial Officer
Dallas, TX  75240-2697                         (972) 233-1700
- --------------------------------------------------------------------------------
News Release
- --------------------------------------------------------------------------------

FOR IMMEDIATE RELEASE
- ---------------------

[LOGO OMITTED]
                 KRONOS WORLDWIDE REPORTS FIRST QUARTER RESULTS

DALLAS,  TEXAS...May 4, 2005...Kronos Worldwide,  Inc. (NYSE:KRO) today reported
net income for the first quarter of 2005 of $21.4  million,  or $.44 per diluted
share,  compared with net income of $9.8 million,  or $.20 per diluted share, in
the first quarter of 2004.

Net sales of $291.9 million in the first quarter of 2005 were $28.6 million,  or
11%,  higher  than the first  quarter  of 2004 due to the net  effects of higher
average TiO2 selling prices, lower sales volumes as well as the favorable effect
of fluctuations  in foreign  currency  exchange rates,  which increased sales by
approximately $11 million.

The Company's  average selling prices in billing  currencies (which excludes the
effects  of  fluctuations  in the  value of the U.S.  dollar  relative  to other
currencies) were 8% higher in the first quarter of 2005 as compared to the first
quarter  of 2004.  Expressed  in U.S.  dollars  computed  using  actual  foreign
currency exchange rates prevailing during the respective periods,  the Company's
average  selling  prices in the first  quarter of 2005 were 13% higher  than the
first quarter of 2004. Reflecting the continued implementation of price increase
announcements, the Company's average selling prices in billing currencies in the
first quarter of 2005 were 4% higher compared to the fourth quarter of 2004.

The Company's first quarter 2005 TiO2 sales volumes  decreased 3% from the first
quarter of 2004,  due  primarily to lower sales volumes in export  markets.  The
Company's TiO2 production volumes were 4% higher in the first quarter of 2005 as
compared  to the  first  quarter  of 2004,  with  operating  rates at near  full
capacity  in both  periods.  Finished  goods  inventories  at  March  31,  2005,
representing  1.9 months of average sales,  were slightly  higher as compared to
December 31, 2004 levels.  The Company's  production volume in the first quarter
of 2005 was a new record for a first quarter.

The  Company's  TiO2 segment  profit (see  description  of non-GAAP  information
below)  for the first  quarter  of 2005 was $48.0  million  compared  with $26.2
million in the first quarter of 2004.  Segment profit comparison was impacted by
the net effects of the higher  average TiO2 selling  prices,  higher  production
volumes and lower sales volumes. Fluctuations in foreign currency exchange rates
did not have a significant effect on segment profit comparison.

Interest  expense to affiliates for the first quarter of 2004 relates  primarily
to the Company's $200 million 9% long-term note payable to affiliates  issued in
December 2003, which was prepaid in November 2004.

Other interest expense  increased due primarily to higher levels of indebtedness
resulting from the issuance of an additional  (euro)90  principal  amount of the
Company's  Senior Secured Notes in November 2004.  Additionally,  other interest
expense  increased due to relative changes in foreign  currency  exchange rates,
which  increased the U.S.  dollar  equivalent  of interest  expense in the first
quarter of 2005 on the Company's  (euro)285  million Senior Secured Notes issued
in June 2002 (and outstanding during the first quarter of 2004) by approximately
$500,000 as compared to the year-ago period.

The statements in this release relating to matters that are not historical facts
are  forward-looking   statements  that  represent   management's   beliefs  and
assumptions  based on  currently  available  information.  Although  the Company
believes that the expectations reflected in such forward-looking  statements are
reasonable,  it cannot give any assurances that these expectations will prove to
be correct.  Such  statements  by their  nature  involve  substantial  risks and
uncertainties  that could  significantly  impact  expected  results,  and actual
future   results  could  differ   materially   from  those   described  in  such
forward-looking  statements.  While it is not  possible to identify all factors,
the Company  continues  to face many risks and  uncertainties.  The factors that
could cause actual  future  results to differ  materially  include,  but are not
limited to, the following:

     o Future supply and demand for the Company's products,
     o The cyclicality of certain of the Company's businesses,
     o Customer inventory levels,
     o Changes in raw material and other operating costs,
     o The possibility of labor disruptions,
     o General global economic and political conditions,
     o Competitive products and substitute products,
     o Customer and competitor strategies,
     o The impact of pricing and production decisions,
     o Competitive technology positions,
     o Fluctuations in currency exchange rates,
     o Operating interruptions,
     o The ability of the Company to renew or refinance credit facilities,
     o The ultimate outcome of income tax audits, tax settlement  initiatives or
       other tax matters,
     o The ultimate  ability to utilize  income tax  attributes,  the benefit of
       which has  been  recognized  under the "more-likely-than-not" recognition
       criteria,
     o Government laws and regulations and possible changes therein,
     o The ultimate resolution of pending litigation, and
     o Possible future litigation.

Should one or more of these risks  materialize  (or the  consequences  of such a
development  worsen),  or should the  underlying  assumptions  prove  incorrect,
actual results could differ  materially from those  forecasted or expected.  The
Company   disclaims  any  intention  or  obligation  to  update  or  revise  any
forward-looking statement whether as a result of changes in information,  future
events or otherwise.

In an effort to provide  investors  with  additional  information  regarding the
Company's results as determined by accounting  principles  generally accepted in
the  United  States of America  ("GAAP"),  the  Company  has  disclosed  certain
non-GAAP  information which the Company believes provides useful  information to
investors:

     o The Company  discloses  percentage  changes in its average  TiO2  selling
       prices in  billing  currencies,  which  excludes  the  effects of foreign
       currency translation.  The Company believes disclosure of such percentage
       changes  allows  investors to analyze such changes  without the impact of
       changes  in  foreign  currency  exchange  rates,   thereby   facilitating
       period-to-period  comparisons of relative changes in average TiO2 selling
       prices in the actual various billing currencies. Generally, when the U.S.
       dollar  either  strengthens  or weakens  against  other  currencies,  the
       percentage  change in average TiO2 selling  prices in billing  currencies
       will be higher or lower, respectively, than such percentage changes would
       be using actual exchange rates prevailing during the respective periods.
     o The Company  discloses  segment  profit,  which is used by the  Company's
       management to assess the  performance of the Company's  TiO2  operations.
       The  Company  believes  disclosure  of  segment  profit  provides  useful
       information  to  investors  because it allows  investors  to analyze  the
       performance  of the  Company's  TiO2  operations in the same way that the
       Company's  management assesses  performance.  The Company defines segment
       profit as income  before  income  taxes,  interest  expense  and  certain
       general corporate items.  Corporate items excluded from the determination
       of segment  profit  include  corporate  expense and  interest  income not
       attributable to the Company's TiO2 operations.

Kronos  Worldwide,  Inc. is a major  international  producer of titanium dioxide
pigments.


KRONOS WORLDWIDE, INC. CONDENSED CONSOLIDATED STATEMENTS OF INCOME (In millions, except per share and metric ton data) (Unaudited) Three months ended March 31, ----------------------- 2004 2005 ----------- ----------- Net sales $ 263.3 $ 291.9 Cost of sales 202.3 207.7 ---------- ---------- Gross margin 61.0 84.2 Selling, general and administrative expense 35.2 37.2 Other operating income (expense): Currency transactions, net .2 .9 Corporate expense (.4) (1.4) ---------- ---------- Income from operations 25.6 46.5 Other income (expense): Trade interest income .2 .1 Other interest income .2 .3 Interest expense to affiliates (4.5) - Other interest expense (9.2) (11.8) ---------- ---------- Income before income taxes 12.3 35.1 Income tax expense 2.5 13.7 ---------- ---------- Net income $ 9.8 $ 21.4 ========== ========== Basic and diluted net income per share $ .20 $ .44 ========== ========== Basic and diluted weighted-average shares used in the calculation of net income per share 48.9 48.9 TiO2 data - metric tons in thousands: Sales volumes 118.1 114.3 Production volumes 116.9 121.6

KRONOS WORLDWIDE, INC. RECONCILIATION OF SEGMENT PROFIT TO INCOME FROM OPERATIONS (In millions) (Unaudited) Three months ended March 31, ----------------------- 2004 2005 ----------- ----------- Segment profit $ 26.2 $ 48.0 Adjustments: Trade interest income (.2) (.1) Corporate expense (.4) (1.4) ---------- ---------- Income from operations $ 25.6 $ 46.5 ========== ========== RECONCILIATION OF PERCENTAGE CHANGE IN AVERAGE TiO2 SELLING PRICES (Unaudited) Three months ended March 31, 2005 vs. 2004 ------------------- Percentage change in average selling prices: Using actual foreign currency exchange rates +13% Impact of changes in foreign currency exchange rates -5% -------- In billing currencies +8% ========