Even though it's way pricey, I am curious just how durable the Ti chain would be. Does anyone have any info? Thanks!

Unless you are racing up mountains, or a serious weight weenie, I would stay away!
Ti wears like butter and it is very expensive!
I only use it on my large cogs on a cassette.

A riding buddy put one on his bike(he was as curious as you are) it lasted for only 1200km!! Chain wear tool (rohloff)showed it to be worn completely, and it was shifting poorly.
Expensive, wears out way to quickly, and for the price not worth the minimal weight savings!
For the same money you can buy several chains, and cassettes instead!