I always bend pedals, seems like I will bend them after one week, pretty much on the dot. I will never spend more than $20 or $30 on pedals again. THe wellgo MG (19.99) or an of the plastics is where I'm at. $120 for pedals is crazy even if you can afford them.
I'm not sure... I've read a bit of debate about the strengths of both, and Ti seems to come out a bit worse for stuff like pedal spindles.
Strength to weight ratios have Ti out front, but in real life application it's a bit brittle and more likely to break. Of couse if the alloy is crappy for either one, you are screwed.