The effects of temperature on mechanical properties of translucent alumina were investigated.The flexural strength of translucent alumina increased slightly at the cryogenic temperature.Comparing the flexural strength of 92%with that of 99%alumina,the results suggest that glass phase had no significant influence on flexural strength.Additionally,the SENB fracture toughness of translucent alumina increased as the test temperature decreased.Considering the fracture toughness of 92%and 99%alumina which contained different content of glass phase,it would be certified that the existence of glass phase would deteriorate the fracture toughness.