system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 - Can usable guns be made from titanium?

I noticed during recent traveling that a titanium implant does not register with metal detectors or any other scanner at the airport. What stops people from making guns from titanium or other similar metals?
gpt
Regulations that exist that require detectable metal in the firearms for that very purpose.

Titanium doesn't make a very good barrel, it expands and flexes to much. Titanium alloys have been used in the frame on certain models, but those trigger the metal detectors, not only because of the alloy material, but because the barrels are still chrome molly alloy steel.

Titanium alloys aren't used in barrels for the same reason, too much expansion and flexing under heat and pressure.

The same qualities that make them a great frame for aircraft and other vehicles make it a poor material choice for a barrel.