Hello!
The SEO Framework automatically adds pagination identifiers to titles for all paginated pages and archives that have their pagination correctly registered with the WordPress Rewrite API. TSF does many of the mundane tasks and recommended practices out of the box (even though Google isn’t explicit about this one, in particular).
So, if you’re on the second page, TSF should add | Page 2 (where | is exchanged with your chosen separator) to the title.
Did you find it not working?