Titans wouldn't take Hass for Young on any day without a 1st round pick. Hass is too old and the titans already got Collins on the verge or retiring, so it is easy to say they wouldn't put themselves into that situation unless they have a shot at getting a young arm in the draft.
There really isnt a "realistic" scenario cause the titans at this point would never trade young, so if you wanted too, try and give them Hass, a 1st rounder and maybe you might coax a late rounder out of them.