During the course the student will become familiar with the properties and application areas of different constructional materials. Aspects of selecting and comparing different materials for energy technology applications are discussed from the viewpoints of functionality, manufacturing aspects, costs and environmental aspects of the product.Future trends in materials science are discussed.Following material groups will be discussed: metals and their alloys, polymers, ceramics, composites, adaptive (smart) materials and nanomaterials.Some environmental aspects of material selection from the viewpoints of LCC and LCA and the basics of MIPS calculations are explained.Principles to solve the materials solution tasks based on systematic approaches staring from the product s requirement list will be discussed.Basic rules to improve the DFMA-properties (design for manufacturability and assembly) of a product are presented and applied to typical energy technology applications. The course is also suitable for doctoral studies.