1. Go to Dashboard, click Design, click Edit HTML
2. Click Expand Widget Templates
3. Find code of HTML below :
You can use (Ctrl+F) to find easily
4. Remove <b:include data='post' name='post'/> with code of HTML below :
- #FFFFFF means color of background is white, you can change it with other HTML color codes you like.
- #000000 means color of post title is black, you can change it with other HTML color codes you like.
Now you've already show only post title in blogger label archive.