Honestly, you could go through all that trouble and have a very nice bike, but I feel like it would have a confused identity. There are lots of nice, collectible (as in, they retain value) vintage bikes out there that will give you all the riding purity you want. There is nothing wrong with steel frames if you take care of them. It's easy to treat them with frame saver to prevent rust, I don't understand the hangup on a Ti frame when most good steel frames will (damage aside) last a lifetime.