Abstract: The Ti-48Al-5Cr and Ti-48Al-12Cr(in at%) coatings were both deposited on Ti60 alloy surface via arc ion plating process. The cycling thermal shock resistances of uncoated specimens and that coated with Ti-Al-Cr coating were investigated at the temperature between 900/950°C and room temperature by forced water cooling. The mass change, phase composition and surface/cross-section morphology of specimens were all discussed. The results showed the Ti-48Al-12Cr coating exhibited high resistance of thermal shock, thus protecting efficiently the Ti60 alloy as substrate. However the Ti-48Al-5Cr coating cannot protect the substrate efficiently because of the less Cr content which results in different oxidation mechanism. The cycling test results revealed that the shock will expedite the spalling and break-up of oxides, thus expediting the occurrence of internal oxidation and the initiation/propagation of cracks.