Force native taxonomy-term pages to only show  and not all content
You can override the default listing with the built-in view, see here https://drupal.stackexchange.com/a/165052/3218

To only show the title you then need to adapt the view:


go to the view's edit page (admin/structure/views/view/taxonomy_term/edit)
change the format-display from rendered entity, to fields
remove all fields and add the title field as only field