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)
                                 March 15, 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
   incorporation)                                                    No.)

   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 7.01 Regulation FD Disclosure. The registrant hereby furnishes the information set forth in its press release issued on March 15, 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 March 15, 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/ A. Andrew R. Louis ----------------------- A. Andrew R. Louis Assistant Secretary Date: March 15, 2005

INDEX TO EXHIBITS Exhibit No. Description - ----------- -------------------------------------------------- 99.1 Press Release dated March 15, 2005 issued by the registrant.

KRONOS WORLDWIDE, INC.                           Contact:   H. Joseph Maas
Three Lincoln Centre                                        President, Sales and
5430 LBJ Freeway, Suite 1700                                  Marketing
Dallas, Texas   75240-2697                                  (609) 860-6200
- --------------------------------------------------------------------------------
PRESS RELEASE
- --------------------------------------------------------------------------------

[LOGO GOES HERE]



FOR IMMEDIATE RELEASE


     KRONOS WORLDWIDE, INC. ANNOUNCES PRICE INCREASES FOR TITANIUM DIOXIDE
                       PRODUCTS IN ALL MARKETS WORLDWIDE


         CRANBURY,  NEW JERSEY - March 15, 2005 - Kronos Worldwide,  Inc. (NYSE:
KRO) today announced price increases for all Kronos titanium dioxide grades sold
in all markets worldwide.

         Effective  April 1, 2005,  or as permitted by contract,  prices for all
Kronos products will increase as follows:

        o     In the United States, by U.S. $0.05 per pound.
        o     In Canada, by C $0.06 per pound.
        o     In Europe, by (euro)100 per metric ton.
        o     In Eastern Europe, by U.S. $150 per metric ton.
        o     In the Middle East and Africa, by U.S. $150 per metric ton.
        o     In South and Central America, by U.S. $150 per metric ton.
        o     In Asia Pacific, by U.S. $150 per metric ton.

These price increases follow the December 2004 and January 2005 increases on all
Kronos titanium dioxide grades, which are expected to be fully implemented by
April 1, 2005.

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

                                    * * * * *