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                          June 30, 2022

       Pablo Brizzio
       Chief Financial Officer
       Ternium S.A.
       26 Boulevard Royal     4th floor
       L-2449 Luxembourg

                                                        Re: Ternium S.A.
                                                            Form 20-F for the 
Year Ended December 31, 2021
                                                            Form 6-K furnished 
April 27, 2022
                                                            File No. 1-32734

       Dear Mr. Brizzio:

              We have limited our review of your filing to the financial 
statements and related
       disclosures and have the following comments. In some of our comments, we 
may ask you to
       provide us with information so we may better understand your disclosure.

              Please respond to these comments within ten business days by 
providing the requested
       information or advise us as soon as possible when you will respond. If 
you do not believe our
       comments apply to your facts and circumstances, please tell us why in 
your response.

                                                        After reviewing your 
response to these comments, we may have additional comments.

       Form 6-K furnished April 27, 2022

       Earnings Release for the First Quarter 2022, page 10

   1.                                                   We note that your 
reconciliation of EBITDA begins with operating income. Please note
                                                        that EBITDA should be 
reconciled to the most comparable IFRS measure which is net
                                                        income. Please revise 
accordingly. See Question 103.02 in the SEC Staff's Compliance
                                                        & Disclosure 
Interpretation on Non-GAAP Financial Measures.
   2.                                                   We note your disclosure 
on page 3 of EBITDA by segment. Please revise to include a
                                                        reconciliation of this 
measure to the most comparable IFRS measure.
       Form 20-F for the Year Ended December 31, 2021

       Item 4. Information on the Company
       Mine Production Facilities, page 39
 Pablo Brizzio
FirstName  LastNamePablo Brizzio
Ternium S.A.
Comapany
June       NameTernium S.A.
     30, 2022
June 30,
Page 2 2022 Page 2
FirstName LastName
3.       Item 1303(a)(1)(i) requires all mines in which you have a direct or 
indirect economic
         interest to be included in the summary disclosure. Please tell us why 
the mining
         operations owned by USIMINAS were not included in your mineral 
property summary
         disclosure as required by Item 1303(a)(2) of Regulation S-K.
4.       We note disclosure on page 42 that none of your iron ore mines is 
considered to be
         material on an individual basis. Please tell us how you assess mining 
property materiality
         and how you made this determination. In your response, to the extent 
applicable, please
         address the availability of alternative sources of iron ore and cost 
savings associated with
         internal iron ore sourcing versus external iron ore sourcing.
5.       Please revise to include the internal control disclosure required 
under Item 1305 of
         Regulation S-K.
Item 5. Operating and Financial Review and Prospects
Critical Accounting Estimates, page 73

6.       We note that your Critical Accounting Estimates section on page 73 of 
MD&A refers to
         Note 3(bb). Please revise your disclosure for compliance with the 
requirements in Item
         303 of Regulation S-K. In this regard, your disclosure should provide 
qualitative and
         quantitative information necessary to understand the estimation 
uncertainty and the impact
         the critical accounting estimate has had or is reasonably likely to 
have on financial
         condition or results of operations to the extent the information is 
material and reasonably
         available. This information should include why each critical 
accounting estimate is
         subject to uncertainty and, to the extent the information is material 
and reasonably
         available, how much each estimate and/or assumption has changed over a 
relevant period,
         and the sensitivity of the reported amount to the methods, assumptions 
and estimates
         underlying its calculation. Please revise accordingly.
Note 4. Segment Information, page F-40

7.       We note your disclosure that the reportable Steel segment comprises 
four operating
         segments: Mexico, Southern Region, Brazil and Other markets. You also 
disclose that the
         four operating segments have been aggregated considering the economic 
characteristics
         and financial effects of each business activity in which the entity 
engages; the related
         economic environment in which it operates; the type or class of 
customer for the products;
         the nature of the products; and the production processes. Please 
explain to us how you
         have determined that aggregation of these four operating segments is 
appropriate under
         paragraph 12 of IFRS 8. As part of your response, please provide us 
with your
         aggregation analysis which includes consideration of economic 
similarities as well as each
         consideration outlined in paragraph 12 of IFRS 8.
8.       We note that in your disclosure of segment information, you present 
several segment
         measures of profit or loss. Please tell us how your presentation of 
more than one measure
         of segment profit or loss complies with the guidance in paragraph 26 
of IFRS 8.
 Pablo Brizzio
Ternium S.A.
June 30, 2022
Page 3

       In closing, we remind you that the company and its management are 
responsible for the
accuracy and adequacy of their disclosures, notwithstanding any review, 
comments, action or
absence of action by the staff.

       You may contact John Coleman at 202-551-3610 for mining related 
questions, and
Charles Eastman at 202-551-3794 or Claire Erlanger at 202-551-3301 with any 
other questions.



FirstName LastNamePablo Brizzio                           Sincerely,
Comapany NameTernium S.A.
                                                          Division of 
Corporation Finance
June 30, 2022 Page 3                                      Office of 
Manufacturing
FirstName LastName