**2. Contributions**

Conventional aluminum alloys have reached their limits concerning their mechanical properties. Thus, finding effective and reliable solutions to develop new alloys as well as new technologies for its processing remains a demanding challenge. In this Special Issue of *Metals*, ten articles have been published, covering a wide scope of recent progress and developments regarding some aspects of aluminum alloys, including their processing, microstructure and mechanical properties, corrosion and surface quality. These aspects can be combined into two main groups (1) casting and (2) forming an aluminum alloy.
