<p>Flanging on sheet metal parts is extensively used in the automotive and aeronautical industries to provide rigidity or support for subsequent assembly. Unlike straight flanges, curved flanges are exposed to severe conditions that significantly hinder our understanding of the geometrical, material, and process factors associated with their formability (i.e., flangeability). Rubber pad forming is one of the most common processes used for small and medium batch production. However, single-point incremental forming (SPIF) using a single-stage strategy has recently been proved as an acceptable alternative where minimum tooling and common CNC machines are employed. This study offers a comprehensive investigation of the flanging process using two distinct approaches: a novel tailored rubber pad forming technique and the single-stage SPIF. The deformation and failure mechanisms, the flangeability limits and the geometric capabilities of each process is analysed. A new hollow specimen design with 6 consecutive concave and convex flanges is introduced. The case study includes the manufacture of 50 mm radius flanges from 1.6 mm thick aluminium alloy 7075-O sheets. The comparative analysis highlights for this material the superior performance of SPIF in producing significantly longer flanges, up to <i>l</i>/<i>R</i> = 0.48 compared to 0.3 for rubber pad forming, as well as lower incidence of wrinkling.</p>