Hey Jerry - you and I seem to be some of the few owners of Taurus Titanium 850 CIAs. I just don't see many comments about these.
I was hesitant to get a Taurus as my 4 other revolvers are all S&W (66, 686, 65LS & 60) but I was intrigued by the idea of a titanium revolver so that's why I got it over the 642.
I had to send it back to the factory before even firing a shot. It was so tight, the cylinder face was scrapping against the forcing cone, causing it to lock up frequently. I have to say though, Taurus fixed it up pretty quickly and it came back with a very nice trigger - smooth and not overly heavy at all. I have no complaints at all but sometimes I find myself wishing I had gotten the 642 for no other reason than it's a S&W.