I have a 6.5" TI tube DM, TI end caps DM & stainless baffles ZM.....I know it's not full auto rated.....but my buddy has  RDIAS
and I have been shooting my can with it....never doing mag dumps....just 3 rd burst....maybe 5....do you think there is a risk shooting
a few rds at a time like this and letting cool down in between mags?

Titanium starts to lose strength around 800 degrees F. Depending on barrel length the can will heat up per shot around 10 degrees +\- a couple degrees. I'd think two full 30 round mag dumps in succession on a warm day could get  close to the limit.  Bursts introduce a duty cycle that slows temperature rise.  So 1 mag with multiple short intermittent bursts and then cool down should be fine.  If you can buy or borrow an infrared thermometer that reads up to 800 degrees you can measure the can exterior.  I think Thunderbeast has guidelines for their full titanium suppressors on their website.

I wouldn't worry about the physical strength, but the more less long term failure.

Titanium over 800*f without some form of shielding (oxygen depleted environment) will oxidize very rapidly.

Check out some titanium welding videos.

I'd worry about stress-corrosion cracking from the inside out in the blast area.

Maybe a 17-4PH blast baffle and sleeve or such as a sacrificial bit in the blast area? Something stainless.

ETA: to clarify, I'm referring to high temp use. Titanium below 800 is going to do well. I'd also be concerned with crevice corrosion, which should exhaserbate the stress-crossion problem. Possible to have a single piece blast baffle and sacrificial sleeve on the blast chamber?

OTOH if your can isn't welded shut, you can always easily clean and inspect it, as well as replacing the blast baffle as needed.

I recommend 3 17-4 baffles and a .050 thick bb spacer along with a ga taper mount brake on host's for full auto. 2 mag dumps max then allow to cool.

Form 1 makers are not permitted to replace silencer parts which must be done by am FFL 07/02.

Excuse me on the second part. Cough cough cough.