5G communication has begun commercial deployment. To maintain the sustainability and competitiveness of wireless communication systems, various industries and academic institutions around the globe are designing the framework for 6G communications. Compared with the previous generations of communication systems, 6G will be revolutionary, with unprecedented requirements in data transmission rates, delays, and global coverage. Many promising technologies in 6G systems, including terahertz communication, ultra‐large‐scale antenna arrays, large‐scale intelligent surfaces, quantum communication, and computing, have differing material requirements compared with previous systems. With the development of materials science, an increasing number of new materials will play important roles in 6G communications. Herein, the high demand of 6G systems is introduced first in this review, and recent advances of new materials having a broad variety of applications with great potential in 6G systems are systematically summarized. Perspectives on the research areas that require special attention are also presented.