The Symposium on Thermal Fatigue of Materials and Components was presented at the meeting held in New Orleans, 17-18 Nov. 1975. The symposium was sponsored by The American Society for Testing and Materials through its Committee E09 on Fatigue. D. A. Spera, National Aeronautics and Space Administration Lewis Research Center, and D. F. Mowbray, General Electric Co., presided as symposium co-chairmen.