Company: TSLTF
Filing Date: 2025-03-31
Form Type: 6-K
Source: 0000950142-25-000890
Chunk: 0

Company: TRANSALTA CORP
Filing Date: 2025-03-31
Form: 6-K
Chunk 0
---
<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE
SECURITIES EXCHANGE ACT OF 1934

For the month of March 2025

Commission File Number: 001-15214

TRANSALTA CORPORATION(Translation of registrant's name into English)

Suite 1400, 1100 - 1st Street S.E., Calgary, Alberta, T2G 1B1
(Address of principal executive office)</div>

Indicate by check mark whether the registrant
files or will file annual reports under cover of Form 20-F or Form 40-F.

<div align='center'>Form 20-F ¨Form 40-F þ</div>

<div align='center'>Signatures</div>

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, thereunto duly authorized.

| TRANSALTA CORPORATION |                                                      |
| By:                   | /s/ Nancy Brennan                                    |
| Name:                 | Nancy Brennan                                        |
| Title:                | Executive Vice President, Legal and External Affairs |
| Date: March 28, 2025  |                                                      |

<div align='center'>Exhibit Index</div>