Have had a 342 (no lock) since about 2002, and have shot it a good bit. Never had any trouble with the Titanium cylinder showing wear, as I clean it carefully. Last year (2018) after a range session I noticed while cleaning the gun that the barrel of the yoke (the portion that is in the center of the cylinder) had a circumference crack around it.
Sent it back to S&W (good service and fast turn around) and it came back repaired with a stainless steel yoke (same as the one in my 642) as a replacement for the original aluminum one. Don’t know if that was because S&W had problems with the original aluminum one, or if they only have the steel one due to the 342 being out of production. Never weighed the revolver prior to the repair, but it now weighs 13.3 ounces on my electric scale fully loaded with 125 gr. Jacked hollow points. I can’t really tell any difference in weight in my hand or in my pocket.
Sent it back to S&W (good service and fast turn around) and it came back repaired with a stainless steel yoke (same as the one in my 642) as a replacement for the original aluminum one. Don’t know if that was because S&W had problems with the original aluminum one, or if they only have the steel one due to the 342 being out of production. Never weighed the revolver prior to the repair, but it now weighs 13.3 ounces on my electric scale fully loaded with 125 gr. Jacked hollow points. I can’t really tell any difference in weight in my hand or in my pocket.