Keep in mind that depending on the grade of Ti used, hardness can vary. Additionally, I don' t know if every company or maker finishes the surface with a clear hard anodizing. I have been carrying and using a Dozier made Ti Folding Hunter for a few years now, all in the shop, backyard and clubhouse. And it has only suffered minor surface scuffs and hairlines. Not any scratching that can be felt if running a nail across its surface. But if you' re the type that allows your knives to fall onto concrete or let tools drop on them and such, then even Ti with or without the anodized finish won' t prevent mentioned scratches.
N.