I used to love titanium, I had three of them. The best one was, by far, the Citizen 4X4 limited. Its Duratect coating was really hard and for two years it didn't get a scratch.
My orange samurai was different. Its titanium was soft as butter, it got scratches very easily.
The same goes for the Citizen Royal Marines Commando GMT, its coating had rapidly started wearing off after just 5 or six months. Worth noting that, as far as I know, that one had not the Duratect coating, Citizen was using another term.
Both were sold immediately and since then I haven't had another. I prefer scratches on steel rather than titanium.