I can assure you that Ti does indeed corrode when in an electrolytic environment, despite the advice of an aeronautics engineer from Bell/Textron. This was a very expensive learning experience for me when I had some custom parts made to replace Stainless ones. The engineer just said "well, look at that. I've never seen that happen before".
Have you noticed how aluminum and chrome plated bits on the S3 corrode faster than normal? Even on the inside of the headlight buckets - check yours.
Is this simply due to Triumph having shoddy plated and cast/coated parts? Or is this is due to the electrical system of the bike? Maybe both?
On brake parts, I will take SS or chromed brass, and let the racers use Ti.