Selection of materials is a complex and multi-criteria decision making problem, which requires a lot of knowledge and experience. Selection process is influenced by few factors such as thermal, mechanical, electrical, chemical, physical and technological properties as well as their price and availability. This paper considers material selection problems of wave energy extraction turbine blade by using MCDM approach. Due to help decision makers in solving this complex task, a decision support system named MCDM Solver. MCDM Solver was used in decision-making process to rank materials for the turbine blade with respect to several criteria. Based on the results the best ranked materials are Carbon fiber reinforced polymer, titanium alloys and Glass fiber reinforced polymer.