Recent advances and perspectives in interface engineering of high-performance alloys

• Systematically examines the roles of grain and phase boundaries in high-performance alloys, focusing on crystallographic features and chemical segregation. • Elucidates how interface structures govern electrical conductivity, mechanical strength, toughness, hydrogen embrittlement resistance, and thermal stability. • Integrates big data analytics with advanced experimental and computational methods to develop robust interface design strategies. • Discusses current challenges and future opportunities, offering a roadmap for next-generation high-performance alloy development.