Surface integrity is the inherent or enhanced condition surface condition of a workpiece after being modified by a manufacturing process. Surface integrity can have a great impact on a part’s function and is therefore of great interest when designing parts and associated manufacturing processes. Surface integrity includes properties such as: Surface texture (topography); Chemical composition; Microstructure; Hardness; Residual stress; Crystallographic texture. These properties are ‘on-surface’ or ‘sub-surface’ and can change as a function of distance to the surface. Of special interest to this Special Issue are (non-exhaustive and non-exclusive list): Contributions linking on-surface properties (e.g., surface texture) to sub-surface properties (e.g., material deformation or residual stresses); Contributions dealing with surface integrity from a product specification, or tolerancing, perspective; Contributions relating surface integrity properties to functional performance.