In the fields of aerospace and automobile engineering and biomedical science, new alloys and metal matrix composites (MMC) are effectively replacing traditional steels and alloys due to their superior mechanical, thermal, biological and tribological properties. Properties of alloys and MMCs also include reduced density and improved performance compared to conventional materials. The characteristics of new alloys and MMCs are largely determined by fabrication technology; for MMCs for example, there are various methods of casting technology used. With the increasing need for sustainable manufacturing, the production and reuse of recyclable materials is being considered for the development of new materials.

The current challenges in the fabrication of metal matrix include the critical need for appropriate working environment of new devices, the need for suitable types of matrix and reinforcement methods and developments in the processing and post-processing method which are still not fully defined. In particular, for developments of biocompatible alloys and metal matrix nanocomposites, the association between the properties, constituents and the production technique is crucial and needs to be carefully explored. Furthermore, due to several intrinsic properties of the particular material, some alloys and composites have a tendency to resist the cutting tool during machining leading to premature tool failure. Additionally, high strength alloys, anisotropic and non-homogeneous structure of metal composites and high abrasiveness of reinforcing constituents further impair machinability. An overview of the different issues concerned in the conventional and unconventional machining of the main types of alloys and composite materials is to be addressed.

This Special Issue will focus on both conventional and unique methods of fabrication, surface modification, and machining of alloys and MMCs, as well as the improvement of the microstructure and properties after applied processes. We invite submissions of original research and review articles addressing dissimilar fabrication methods, reduction and elimination of the difficulties in machining of metal-ceramic composites and the reduction of wastes and production costs. We also welcome discussion on test results related to casting and conventional and novel machining operations for different kinds of alloys and MMCs.

Potential topics include but are not limited to the following:

• Material production, fabrication, manufacture, and processing
• Magnetic, electrical, thermal, and electrochemical machining
• Strength, durability, and mechanical behavior of alloys and composites
• Green and renewable materials, and machining methods
• Materials in medicine, energy, aerospace, and nanotechnology
• Surface modification techniques using laser, heat treatment, and mechanical process
• Additive manufacturing and metal forming of functional materials
• Tribological and corrosion behaviour of alloys, and composites