Too tough a match up to pick without actually putting some thought into it. And it might take more thought than I'm willing to give for a 100% impossible match
Canelo heart wont allow him to last that long. Canelo is not used to being bullied , overwhelmed and bombed out by a much bigger man. He would try to fight fire with fire with Tito at some point during the fight to prove hes the true powerhouse between the two..... Its pretty much over after that. Canelo will get clipped hard. Having a massive heart can be a great thing but it can also be a doubled edge sword.
Tito all day. Canelo's style of walking forward slowly trying to cut the ring off would play right into Trinidad's hands. He ate that style up. Canelo likes to fight in mid-range and Tito lives there. He'd unload those left-hooks all day.
Canelo. Nineteen times out of twenty. (Assuming Canelo's team are on hand to monitor Tito's 'hand wrapping.')