Dislocations: Yield strength of a perfect crystal, Properties of dislocations, dislocation interactions. Plastic deformation in single and polycrystalline materials: Plastic flow in single crystals, Stress-strain behavior of single crystals, Plastic flow in polycrystals, geometrically necessary dislocations. Strengthening of crystalline materials: Work hardening, boundary strengthening, Solid-solution strengthening, particle hardening, microstructure and processing. High-temperature deformation of crystalline materials: Creep mechanisms, deformation mechanism maps, materials aspects of creep design, Engineering estimates of creep. Fracture: Fracture modes, fracture mechanics, fracture mechanism maps, toughening in ceramics. Fatigue of engineering materials: Fatigue fracture, evaluation of fatigue resistance, fatigue-crack growth rates, cyclic stress-strain behavior. Examples from ceramics, composites, and polymers.