The microstructure and texture of melt-spun UNS S31803 (DIN W. Nr. 1. 4462) duplex stainless steel were analyzed after casting and solution treatment. The cast ribbons contained austenite (γ) and ferrite (α or δ) with roughly equal compositions. The α and γ had b100N and b110N partial fiber textures, respectively. After solution treatment, the texture was maintained, the amount of γ phase increased, and the alloying elements were partitioned as expected, according to whether they were ferrite or austenite stabilizers.