What are Title link and Enclosure links in Blogger?
1. Title link
The main function of the title link is described as linking to another hypertext when clicking on the article title. But, it is only true or mostly true if your blogspot template is default template or is written in style of Google Blogger Developer. So, you can customize it to work as you like.
2. Enclosure links
Enclosure links is used when you want to add media files (MP3 files, MP4 files ,Image files) to your post.
How to enable Title links and Enclosure links in Blogger?
With Blogger v3, you just need to go to "Settings", find "Title and enclosure links" in the "Site feed" section and activate it.
In case you want to read more: