Right tackle Dave Stewart may not be back next season, and if he's let go the position becomes a big need for Tennessee. Robinson is a powerhouse left tackle for Auburn and has the physical blocking style to succeed on the right side. Once Michael Roos retires or moves on, Robinson can shift to the left. It will be worth monitoring what the Titans say about Jake Locker. A quarterback could be on the table.
Taking Robinson here is probably the smart move. They are going to have to replace both tackles in the next 2-3 years. As Dan said, Robinson could play on the right side until Roos moves on, and then you could spend a later round pick on a right tackle next year.
Other players I would like to see the Titans consider if the draft plays out like this: the highest rated corner on their board if Alterraun Verner leaves in free agency, S Ha-Ha Clinton Dix, DT Ra'Shede Hageman, MLB C.J. Mosley (but would want them to trade down to acquire the last 2)