I've been buying Ti parts from Toronto Cycles for years, as-needed, a few at a time. I have found the service reliable, the prices reasonable and the parts themselves well-made. I've equipped my winter bike with Ti chainring bolts, brake pad hardware and V-brake pivot bosses and bolts. These parts are reliably *not* corroded after a season exposed to snow and salt. And the bike is at least a couple grams lighter!
Steve