This book collected the selected full text papers from the 17th International Symposium on Advanced Materials (ISAM-2021), which took place during October 18-22, 2021, in Islamabad, Pakistan. This edition represents the results of scientific investigation and engineering analysis of materials' properties and possible conditions for their applications. There are analysed fatigue and damage processes of structural materials, and investigated the microstructure and features of semiconductor and nanosized materials and structures for photovoltaic, optoelectronic, and energy applications. Functional ceramics are also explored. This book will be useful not only to engineers but also to academic researchers and students.