But now your title will come first on clicking your post which ill make it seo i.e the blogger title is swapped.
1. if you want blog title to appear after your post title separated by | sign.
2.Only post title will appear after clicking post.
First Change title tags for your blogger posts with blogger title-
Option 1. Go to Template then Edit Html
Search for this tag <title><data:blog.pagetitle/></title>
Replace this tag with Following tag