Collection of selected, peer reviewed papers from the the 4th International Conference on Advanced Engineering Materials and Technology (AEMT 2014), June 14-15, 2014, Xiamen, China. The 323 papers are grouped as follows: Chapter 1: Nano Materials Science and Technology, Chapter 2: Metals and Alloys, Chapter 3: Steel Materials and Applications, Chapter 4: Resin, Rubber and Polymer Materials, Chapter 5: Optical/Electrical/Magnetic Materials and Technology, Chapter 6: Ceramic Materials and Technologies, Chapter 7: Composite Research and Applications, Chapter 8: Fiber Materials, Chapter 9: Chemical and Energy Materials and Technologies, Chapter 10: Films Materials, Surface and Coating Research, Chapter 11: Biomaterials and Applied Research, Chapter 12: Environmental-Friendly Materials and Green Technologies, Chapter 13: Materials Processing, Testing and Monitoring Technologies, Chapter 14: Applied Mechanics, Building Materials and Construction Engineering