[ChrisH]

The problem with both titanium and carbon composites is not the cost. At least not fron FIRSTs view. It is the hazards inherent in working with these materials.

Titanium is best joined by welding which must be done in a VERY inert environment, usually a purged box. A standard inert gas welder is usually not good enough.

Carbon composite has a large potential for very nasty splinters if not machined correctly or if it breaks. I work with the stuff every day and get more than my share of splinters. Most of them come out, eventually.

While both raw materials are relatively expensive, it is the working of them that really costs. Especially if you don't know what you are doing or cut corners on the proper equipment.