The International Thermonuclear Experimental Reactor (ITER) program is a multinational effort to design and develop the technology for a superconducting magnetic fusion energy reactor that can achieve long burn times using a deuterium-tritium fuel. During the recently completed Conceptual Design Activity (CDA), teams from the U.S., Japan, Soviet Union, and EC generated a baseline design useful for physics and component modeling and also serving as a focus for component and materials R&D. Here I will review the ITER CDA magnet design, choice of magnet structural materials, and the effect of materials and design limitations on ITER operation. In addition, the selection and availability of superconducting materials will be briefly discussed.