Review, Structure–Property Relationships and Multi-Objective Design in Advanced Metallic Systems: From Nanocrystals and High-Entropy Alloys to Bulk Metallic Glasses: Structure–Property Relationships and Multi-Objective Design in Advanced Metallic Systems: From Nanocrystals and High-Entropy Alloys to Bulk Metallic Glasses. JNA. 2026;2(3):16-37. doi:10.65273/hhit.jna.2026.2.3.045