Afterthought: and remember to look very closely at the corrosion of other materials the Titanium connects to, you can't just mix two kinds of metal in one construction exposed to salt water without figuring in exactly where the contact points are between the two kinds of metal and how you deal with the potential difference at that point. The typical way is to use some kind of sacrificial anode at the stern of the vessel (and possible a few others if it is large enough), if you don't take care of this you may lose fittings, stays and terminals well before their time.