It COULD be true, but I doubt it. I am pretty sure there is some law that says something along the lines that any weapon that can't be detected by a metal detector is illegal, and since Titanium isn't magnetic in many forms it COULD be illegal to own them.
I highly doubt it as I am pretty sure even Big 5 sells some, and I am probably wrong about the whole magnetic thing. Anyways, you might want to look for something along those lines, like undetectable weapons, or non-detectable, etc. and go from there.
Or you could just wait for someone who knows what they are talking about to come along.