The dealership won't ask you for your title when you come in.
However, if the problem is accident related, they will be able to tell and not likely will honor the warranty.
The bodyshops have their own warranty on their work.
However, it usually expires once the car is sold by the original owner.
incorrect... the salvage title gets tied to the VIN number. They will always use the VIN number when doing warranty work. As soon as their database gets updated (once a year or so), the salvage title will show up and warranty will prolly be voided