Does changing post title effect SEO?

[neosphere]

Simple that. If you are getting a result with your current title and description then don't even think to disturb them otherwise ranking will drop.

[damponting44]

If your current title is not bringing any useful traffic to your website, and your website is not ranking well in the search results, then it is a good idea to try a different title, and see where the position comes, changing title effects SEO often.