No, titanium isotopes in nature are stable, i.e. not radioactive. However as an interesting fact, during the production of titanium dioxide (used in paints, make-up etc.) as a side effect/result you can expect higher levels of radioactivity as TENORM (technologically enhanced naturally occurring radioactivity). read more
Because titanium is non-ferromagnetic, patients with titanium implants can be safely examined with magnetic resonance imaging (convenient for long-term implants). Preparing titanium for implantation in the body involves subjecting it to a high-temperature plasma arc which removes the surface atoms, exposing fresh titanium that is instantly oxidized. read more