I hope it’s of some help Peter but it’s increasingly risky to recommend anything these days, ideally a link to a ‘paper’ from a renowned source would be preferable but as you well know, even contents of same may come under attack - where does it end?!
I just rely on my materials science modules as part of my degree and the testing of various sheer strengths of materials. Normal ductile steel always much performed better than Ti and HSS etc. Ti is fine for decorative, but for anything that carries load I go with what the manufacturer installed. I do use stainless for non critical areas, like rearset mounts etc. Stress corrosion fatigue/cracking was particularly interesting in relation to aircraft grade alloys. However it affects all materials. Inc ductile steel. Damned salt sucks.
That could be a good shout actually. I have in the past bought caliper bolts that are a few mm different, and unnoticed until you line them up side by side on a flat surface
Don't Ti bolts stretch when you (first?) tighten them? I have a recollection that when re-fitting Ti con rods to an SPS engine, you have to torque them up, then measure the stretch, then torque them some more - or something like that. This page describes the process better than I can! http://www.ducati.ms/forums/56-superbikes/348738-ti-conrod-bolts-tightening-angle.html Not sure if the same would apply to the pinch bolts on a SSSA? Might be safer to just stick with steel bolts, as others have said.