My Pam 116 (titanium base) has sttod up very well to use in the four or five years I've had it. I know that titanium has a reputation as a scratch magnet, but the brushed finish does a great job of hiding the minor marks. Yes, it's picked up a couple of serious knocks and dings, but what watch wouldn't have? (OK, maybe a Damasko!)
Mine looks better than my brother-in-law's steel Panerai, as the polished surface shows many more small scratches. I'll try to take a couple of pics tonight, if you like.
I'm very pleased with the way that my Panerai has aged! :)