The creep-fatigue life of a cast Ti-45Al-8.0Nb-0.2W-0.2B-0.1Y (at.%) alloy was investigated at 750 C by
the consideration of effective dwell time. The life to failure decreases linearly with the increase of
effective dwell time, and decreases exponentially with the increase of minimum creep rate. A linear formula
and a power-law formula for the life prediction of creep-fatigue were proposed. Both creep-fatigue
life prediction formulae have a good agreement with the experimental data.