This application follows a COST Strategic Workshop entitled “Physics of Amorphous Solids: Mechanical Properties and Plasticity”, which received the enthusiastic participation of early-stage and senior researchers with very diverse backgrounds: theoretical and experimental physicists, material scientists, mechanical engineers, metallurgists, rheologists etc. Held in March 2010, the workshop revealed the need and importance to promote collaboration between scientific communities in Europe on the topic of amorphous solids. It was thus decided collectively to apply to form a collaborative Action network.