<p>The wear and corrosion failure are the main factors to restrict the service life of 2205 duplex stainless steel. In this paper, the phase evolution and its effects on wear and corrosion properties of 2205 duplex stainless steel after solution—aging treatment are systematically studied. The results show that the fraction of low angle grain boundary (LAGB) of austenite (γ) and ferrite (α) phase was gradually decreased, and the shape of γ phase was changed from lamellar to equiaxed as the increasing in solution and aging temperature. At aging of 800&#xa0;°C, the σ phase was found at the interface between γ and α phase. A large amount of Cr element was diffused into the σ phase. The sample’s hardness and wear resistance were decreased according to solution temperature due to the increasing in grain size and the reduction of LAGB. The solution sample’s wear mechanism was mainly adhesive wear. The existence of σ phase obviously enhanced aging sample’s hardness and wear resistance according to aging temperature. The aging sample’s wear mechanism was mainly abrasive wear under different loads conditions. The solution sample’s corrosion resistance was gradually enhanced according to temperature owing to the decreasing in LAGB and the increase in γ phase. At low aging temperature condition (NO.4), no σ phase was formed to contribute to the best sample’s corrosion resistance. However, when the aging temperature was larger than 800&#xa0;°C, the aging sample’s corrosion resistance was significantly decreased because the formation of σ phase leaded to the poor of Cr element in γ and α phases.</p>