Subcategory and parent category name on title

Selected answers from the Dumb SEO Questions Facebook & G+ community.

• 
  URL Shortener: Is ok display subcategory and parent category name on title, or just display main category name on items ?
  
  In deep ( display main category name on items ) :
  
  Right now have, 10 categories and 60 subcategories, the problem is that there are duplicate subcategories titles eg :
  
  (subcategory ) Abstract, It appears in five categories.
  
  but all titles are : Abstract - Image Gallery | Mysite.com
  
  when I think it should be :
  
  Abstract - Maincat-1 - Image Gallery | Mysite.com
  
  Abstract - Maincat-2 - Image Gallery | Mysite.com
  
  Abstract - Maincat-3 - Image Gallery | Mysite.com
  
  etc..
  
  ↥ that is good?
  
  Best Regards
• 
  Edwin Jonk: From the expert panel in this week's SEO Questions hangout on air on 01:02:34 into the YouTube video: https://dumbseoquestions.com/q/subcategory_and_parent_category_name_on_title +URL Shortener
  
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