I have a few ideas I'd like to propose, and depending on feedback I may try my hand at modding some.
A specific use for tritanium armor, instead of just "better armor that's more expensive"
Have it be half-blocks. Can be 1 wide, 2 wide, corners, like we have with regular armor, but all of them only half of a block deep.
Have it only attachable on the one main side. Meaning you can't stack them directly or other things directly on them. You can get creative to layer them with bigger structures of other parts, but the balance is the volume of space needed to do that.
Probably start with it being the same hit points as the regular armor. Maybe more pen resistance, but it needs something unique I feel. Better against explosive damage, or possibly laser types? Not sure.
On top of creating a unique building element being an armor block with an effective exclusion zone, aesthetically it would be nice to have a half-depth piece, and I imagine someone can come up with a cool texture
Extra extra idea, have alloy armors that behave this way (the half block, one side attachment thing) but have different metal combinations give it different bonuses.
Maybe like:
Tritanium steel alloy - explosion resistance
Copper steel alloy - emp/disruptor resistance
Uranium steel alloy - pen resistance
Sulphur steel combo - reactive armor that destroys projectiles in a cone when hit as a one off
High carbon steel - HP boost
Hmm okay I really like this one... opens a lot of doors and I don't think it'd be too hard to balance