One if you want blog title to appear after your post title separated by | sign.
Or
Only post title will appear after clicking post.
First Change title tags for your blogger posts with blogger title-
Go to Layout then EditHtml
Search for this tag <title><data:blog.pagetitle/></title>
Replace this tag with Following tag-
<b:if cond='data:blog.pageName == ""'>
<title><data:blog.title/></title>
<b:else/>
<title><data:blog.pageName/> | <data:blog.title/></title>
</b:if>
Now For the Only Post Tilte Will appear read My next Post