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Re: Cost to Replace Chainplates? Should I Walk Away?
Titanium is expensive in two ways: The metal itself, and machining it. A bolt will be expensive because of the threading and machining, in that sense it could almost be cheaper to cut (waterjet, plasma, whatever) a titanium chainplate than to thread titanium parts. Stainless is prone to crevice failure if it gets damp and stays damp--as chainplates are prone to do. Titanium doesn't have that problem. Then again, neither does bronze, which may be another consideration for you if the strength is high enough.
Access, interior trim or hull work, and whether the water damage has crept several yards beyond the chainplate, these are the things that can really push up the price way beyond the parts.