Friction stir incremental forming method developed by the authors was applied to forming A2017 aluminum sheets.The dimensions of 100 x 100 x 0.5 mm^3 aluminum sheets were employed for specimens. Forming conditions, tool rotation rate and tool feed rate, were changed and formability was evaluated. When the tool rotation rate was 8000-10000rpm and the tool feed rate was 3000 mm/min, the minimum half apex angle of 25° this coincides with themaximum elongation of 137% was obtained. Formed parts were artificially aged and Vickers hardness test was performed. As aging time increased, the hardness was decreased to 70 HV in the final. This means forming did not clear the pre-aging processing or complete full aging. The tensile strength of formed parts were about 280MPa which was theintermediate value between as received one of 373MPa and fully aged one of 200MPa. From the microstructureobservation, the grains were fined by forming but some voids and impurity were found.
