Of all the various builds I have followed on ExPo over the years, this is probably my favorite. Building a bicycle for expedition use is an AWESOME idea and one I tried to tinker with years ago but never followed through on.
I've heard FORM bicycles are top-notch and the Ti setup sounds sweet! Steel frames usually are the best option because of feel but you sacrifice because of weight. I rode a Serotta road bike with Ti frame and man, if I hadn't already bought a carbon frame for the road I would have gone Ti as well.
What is the expected completion date for your build and if you do make it to Fruita, keep me posted as that's an area I've longed to ride at.