the present invention provides a beta - type titanium alloy including , by weight %: nb : 10 to 25 %; cr : 1 to 10 %; at least one of zr : 10 % or less and sn : 8 % or less , satisfying zr + sn being 10 % or less ; and the balance of ti and inevitable impurities , the alloy having young &# 39 ; s modulus of 100 gpa or less , a process for producing the beta - type titanium alloy , and a beta - type titanium alloy product .