No experience with those two, but I do know that titanium is very cathodic (noble) on the
galvanic series. In a seawater environment, that's "good for titanium, but bad for any other metal anywhere near it" ... because although the titanium will likely survive, it will effectively "eat" any more cathodic metals (which includes pretty much everything -- see the galvanic series) anywhere nearby. It's kinda like leaving a pencil line on a prop shaft ... your prop shaft might be made of the most "corrosion resistant" SS or monel, but it's no match for graphite, and you will very likely have a groove and crack in your propshaft along that pencil line before too long. Add vibration and it's
goodbye prop!
