Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
Rank Math doesn’t change the page title of your website. If you’re referring to the SEO title, Rank Math automatically includes this to your posts/pages using the format you set in Rank Math > Titles & Meta > Posts/Pages > Single Post/Page Title.
In case, you want to use the SEO title the same as your page title, you can only use the %title% variable:

However, if you change the SEO title from the Rank Math SEO Meta box, then the setting in the Title & Meta will be overwritten.
If you still face any issues, please share a screencast with us by using a tool like https://loom.com so that we can check this further for you.
Hope that helps and please don’t hesitate to let us know if you have any other questions.
Thank you.
In my POV, Rankmath does not change title, its may Google.
Hello,
If you see a different title on Google SERPs, please note that nowadays, Google does that very commonly. Even when everything is fine, Google may choose to display a different meta title for your search query result. Google may skip the custom metadata you have set and instead display something from the page’s content that better matches the search intent.
You can follow this URL for details on this issue:
https://rankmath.com/kb/different-meta-title-and-description/
Here is an article you can also check for reference:
https://www.searchenginejournal.com/google-changes-more-than-61-percent-of-title-tags/435618/
Hope that helps and please don’t hesitate to let us know if you have any other questions.
Thank you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.