Compared to white gold and even steel, titanium is a much harder alloy to scratch. Grade 5 titanium technically can be polished - but is mostly left in a brushed finish and matte finish on RM watches. The Titanium variants definitely show very few scratches with careful use, although scratches on titanium bezels do occur on RM 011 watches. Grade 5 titanium even in polished form takes arguably more force to scratch than polished steel or polished precious metals. I have a "matte" or "sandblasted" titanium Bulgari watch that I've worn regularly for years and it shows very little wear (although, I'm probably more careful than the average person).
The Carbon version in real life to me looks more matte. But it's not the most matted matte. But despite being quite matte, it definitely looks pretty eye catching that it might come across as somewhat glossy! I guess this is kind of an opinion; to give you a precise answer would probably require me to give you an albido index (albido is a reflection index used for telescope mirrors in spacecraft). But I consider it to be matte.