Yes, Now you can change the Title of the blogposts on individual post-view. You might have seen that I've changed the Title of my homepage to "Tech blog for Blogger tricks, widgets, templates, adsense tips and much more." This trick can help in boosting your search engine rankings.

By default, your Blogger's title on the top left displays your blog title, and if it's in the items page, it'll include your post title as well.eg, Blogger TTT:Change the blog title for blogposts. By copying the coding from below, you can change the default behavior of the title tag.

Step 1-Goto Blogger Dashboard>>Layout>>Edit Html
Step 2-Backup your template
Step 3-Follow the instructions below

Find this code in your XML template{in header}

<title><data:blog.pagetitle/></title>

Now replace it with

<!-- Start Widget-based: Changing the Blogger Title Tag -->
<b:if cond='data:blog.pageType == "item"'>
<b:section id='titleTag'>
<b:widget id='Blog2' locked='false' title='Blog Posts' type='Blog'>
<b:includable id='comments' var='post'/>
<b:includable id='postQuickEdit' var='post'/>
<b:includable id='main' var='top'><title><b:loop values='data:posts' var='post'><b:include data='post' name='post'/></b:loop> ~ <data:blog.title/></title></b:includable>
<b:includable id='backlinkDeleteIcon' var='backlink'/>
<b:includable id='feedLinksBody' var='links'/>
<b:includable id='backlinks' var='post'/>
<b:includable id='status-message'/>
<b:includable id='feedLinks'/>
<b:includable id='nextprev'/>
<b:includable id='commentDeleteIcon' var='comment'/>
<b:includable id='post' var='post'><data:post.title/></b:includable>
</b:widget>
</b:section>
<b:else/>
<title><data:blog.pageTitle/></title>
</b:if>
<!-- End Widget-based: Changing the Blogger Title Tag -->

Further more you can add a very good keyword in homepage's title by just adding Keyword + Blog Title by finding this line in the above code{3rd last}-

<b:else/>
<title><data:blog.pageTitle/></title>
</b:if>

and adding keyword here

<b:else/>
<title> <data:blog.pageTitle/>Keyword</title>
</b:if>

Be creative in writing Keyword, it will surely help your blog grow and also for search engine optimization.
I would like to thank Webtalks for sharing such a great trick with us.