Kekerasan kelas kemurnian paling dhuwur saka titanium murni industri / bolt titanium murni biasane kurang saka 120 (Brinell), lan kekerasan titanium murni industri liyane yaiku 200 nganti 295 (Brinell). Kekerasan casting titanium murni yaiku 200 ~ 220 (Brinell). Nilai kekerasan paduan titanium/bolt titanium ing negara annealed punika 32 ~ 38 (Rockwell. C kalibrasi), padha karo 298 ~ 349 Brinell atose. Kekerasan Ti-5Al-2.5Sn lan Ti-6AlIV minangka cast yaiku 320 (Brinell), lan kekerasan casting Ti-6Al-4V kanthi impurities reresik kurang yaiku 310 (Brinell).