have never heard of ammo restriction with a titanium cylinder. as ti is structurally stronger than stainless. which model was it?...
http://en.wikipedia.org/wiki/Tensile_strength
you don't have to baby titanium for cleaning. titanium is all but inert
main drawback to titanium is high cost ...special procedure for machining/fabrication in an inert atmosphere. ever try to drill titanium? if you overheat bit, ti will harden like armour plate.
talked to the folks at S&W about my 340PD and 337PD.... they told me to be careful with what solvents to clean the ti cylinder. what a crock! what they probably were doing is trying to protect the aluminum frame. which you do need to be careful of
you could dip a S&W airweight with titanium cylinder into a vat of acid. the entire gun would meld, but titanium cylinder would be fine.
Here is a quote from an "older" 340PD manual. Maybe yours doesn't have it.
"Do not use Magnum loadings with bullet weights of less than 120
grains - This will reduce the possibility of premature erosion in
titanium alloy cylinders."
I agree that the solvents aren't the issue on the titanium cylinder. As I stated you still have to be careful with the NGs of the solvents and the Scandium frame. But, my 296 manual stated not to use wire brushes with the solvents, again due to erosion of the cylinder. My titanium framed 296 also stated on the barrel not to use bullets over 200 grain. The reasoning explained in the manual was that heavier bullets could jump the crimp locking up the cylinder.