The 40th IDDRG Conference will be held on June 21. - July 2., 2021 as an online event. The conference main title is “Digital Technologies in Sheet Metal Forming“ and organized by the Institute for Metal Forming Technology at the University of Stuttgart. The aim of the conference is to bring together industry and academia in an online event due to pandemic conditions. Beyond the foregrounded topic all technical aspects of sheet metal forming are included, such as behavior of sheet materials, formability, tools, tribology, process robustness, simulation methods and experiments. For further information please visit the Conference Website at http://www.iddrg2021.uni-stuttgart.de.