The MJ-10 is a 350mA driver. MJ designed and built these canisters to work with regular AA cells at 1.2v-1.5v. Some have had luck driving them even with 3.6v but they were not designed for this. I believe I have had one canister fail from 3.6v myself. I haven't had a failure yet at 3v but MJ doesn't support that voltage since it's a boost only driver. Obviously with higher voltage than rated so will the mA be higher as well for brighter output.
We have some new designs Chris has programmed we are considering building in Ti. Chris was the first to machine a run of Ti lights I believe (and has run a number of Ti parts) so TnC has experience with Ti.