This course aims to provide graduate students a solid foundation about the structural properties of materials. The structure of crystalline materials and imperfections (point defects, dislocations and grain boundaries) will first be introduced. Then, the idea will be emphasized that the structural characters determine the structural properties. Three types of structural properties will be discussed in details – elasticity, plasticity and fracture. Each of these structural properties will be derived based on the knowledge about material structure, physical assumptions and mathematical tools. To this end, necessary theories of continuum mechanics and micromechanics will be introduced. Upon completion of the course, students are expected to have an in-depth understanding of structure and structural properties of materials and be able to perform quantitative analysis in their research.