Laser powder bed fusion (PBF-LB/M) of bulk metallic glasses (BMGs) has experienced growing scientific and
industrial interest in the last years, with a special focus on application relevant systems based on zirconium. The
high cooling rates and the layer-wise build-up process allow overcoming size and geometry limitations typical for
conventional casting routes. Yet, the novel production approach requires different alloy characteristics than
casting processes. The present work reports for the first time on the PBF-LB/M-processing of three CuTi-based
bulk metallic glass formers in the Vit101 system, allowing to exceed the mechanical performance of most
additively formed Zr-based BMGs. Furthermore, the influence of alloy properties like thermal stability and
toughness on the PBF-LB/M applicability are systematically studied. Thermal stability plays a minor role to
produce amorphous specimen, while notch toughness is found to be a more crucial aspect to achieve parts with
low defect density and resulting high mechanical performance. The results suggest fundamentally different alloy
development strategies adapted to the needs of the PBF-LB/M-process, leaving classical casting-based optimization of glass forming ability behind and evolving towards a rather toughness-oriented optimization
