It is not added yet, but here is what I suggest you:
1. Define a new meta field for your Blogs module. It will hold the page title for the current blog post.
2. Create a class in the App_Code, which is inheriting from BlogPosts control.
3. You have an access to the current item that is showed. Just get the metafield, and set the page title with this field's value.
I hope this helps.
the Telerik team