Understanding the deformation and fracture mechanisms in backward flow-forming process of Ti-6Al-4V alloy via a shear modified continuous damage model

•Studied three different roller arrangements in backward flow-forming via user defined sub-routines in a FE framework.•Created 3D fracture strain maps for stress triaxiality/Lode parameter and stress triaxiality/thermal softening factor.•Highligted the limitations of the wedge flow-forming test to evaluate the flow-formability.•Characterized the fracture locus to evaluate the flow-formability.•Developed a summary chart correlating the process parameters and flow-formability.