Closed-loop controlled 'constant-strain' stress relaxation tests at strains of 0.0025-0.0072 were carried out on α-β, Ti-6Al-2Sn-4Zr-6Mo alloy at 0.45 T m to evaluate power-law creep. Stress exponent of 20.1-6.9, instead of about 4 for dislocation creep in Ti-alloys, was obtained. This is attributed to the contribution of delayed elastic strain to the total strain.