A titanium alloy includes 15 to 27 atomic % (at%) of tantalum (Ta) and 0 to 8 at% of tin (Sn), the balance being titanium (Ti) and unavoidable impurities, when the entire 5 amount of the titanium alloy is taken as 100 at%. Therefore, the titanium alloy provided has characteristics suitable for medical device materials, biocompatible materials, etc.