In drupal 7 how to group fields of a view?
What about  making two separate versions of the view: 1 page view with title fields and an attachement with author fields, or 1 page with titles, and the other a block with authors? 
So you first create a page view with a fields display. When adding fields, you select titles *and you make sure you set the field for "This page only".



Afterwards, on the top of the view, you select "add attachment". 
You will have an attachment versin of the view. In this, you add the "title" field. 
Again, make sure it's "for this attachment only". Now, go to "Attachment settings and select attach to page.