Originally Posted by
navyasw02
I'm pretty certain that is incorrect. I've taken a lot of materials science courses and never, ever heard that Titanium wear resistance is noticeably worse than steel. "Wear" as we're talking here isn't just wear as you'll find in engineering books, but we're also talking about fatigue stress. I'm pretty certain you'll wont notice the difference in the life of your Titanium cogs vs Steel unless you dont properly maintain your bike.
Dude you are totally incorrect. Titanium has a hardness of under 40 rockwell-c. Steels are over 50 and can reach 70 as tools. Titanium has a major problem with galling because it is soft. Threading titanium into itself is not a good idea. The threads will gall together regardless of thread lube. It has a high tensile strength, but poor shear strength.