post title

hello.. i am using "all in one seo pack" plugin for wordpress and i have a question? can i write differents titles? one for post tile (the visitors will can read that) and another for seo tile (google will can read that.. and use for seo) example: seo title: keyword (maybe the article dont...

Is there some way to check if there's a certain keyword in a wordpress post title? According to the wordpress codex, there are functions like is_category, in_category or has_tags to check if a post is in a certain category or uses specific tags. But I need something like an "in_title" function...