Titanum and its alloys have been used as the important materials of eyewear frame because of its light weight, mechanical strength and corrosion resistance. This study investigated the characteristics of P-Ti and ${eta}$-Ti alloys in accordance with joining conditions by electric resistance brazing. Hardness of P-Ti and ${eta}$-Ti has been reduced because of an increase of grain size by the growth of brazing time. Hardness reduction and reduction area by grain growth were largely appeared in P-Ti than ${eta}$-Ti.