People always get jazzed about the Black Diamond Poles and the truth is that their Flicklock system is more reliable than other locking poles (except the Komperdell Power Lock system which is virtually the same as the BD system, but is offered on much lighter C2 carbon poles). However, NOTHING is more reliable than a fixed length pole.
The new Stix are actually repackaged Komperdell Featherlight poles which are REALLY tough (see the review on this site). I've used these poles for everything from agressive snowshoeing including cliff jumps to backpacking to XC skiing. They have lasted very well. I've also used the lightest BD poles and these fixed-length poles are MUCH lighter and also more durable, in my experience.
I've never used the Ti Goat poles but I think it's safe to say that the locking mechanism will not be as reliable in rough conditions as these other options.
If you want adjustable, look closely at the Komperdell C2- I've also pounded these and they are still working perfectly.
Another really neat pole is the Komperdell Nature Stick Carbon. A bit heavier but SO beautiful. Worth a look.
Best of luck with your purchase!
Doug