When I started caving, I used non-SS bars on my brake bar rack. The bars did rust, but to no ill effect. The rope path always stayed shiny due to frequent (SRT only) use. Possible advantages of stainless: aesthetics and more wet-abuse-tolerant (e.g. spends week stored in a wet pack). A clear disadvantage is that SS is significantly harder to machine than most non-SS steels. If I wanted a steel device, I'd settle for plain, uncoated steel. If it were an existing design (e.g. CRITR), I'd want the shape to be scaled/modified, especially the head, to compensate for friction difference between Al and steel. Not seeing any practical benefit to a Ti version.