Metallurgical production traditionally involves three steps: extracting metals from ores, mixing them into alloys by liquid processing and thermomechanical processing to achieve the desired microstructures. This sequential approach, practiced since the Bronze Age, reaches its limit today because of the urgent demand for a sustainable economy: almost 10% of all greenhouse gas emissions are because of the use of fossil reductants and high-temperature metallurgical processing. In this talk, we will discuss a H₂ redox-inspired alloy synthesis strategy, turning oxides into sustainable bulk alloys in one single solid-state process step. We ask three fundamental questions: (1) What are the thermodynamic processing guidelines? (2) What are the rate-limiting kinetic phenomena at play? (3) What are the potential microstructure/alloy design opportunities? We will address these questions in quantitative depth by combining in situ experiments and theoretical calculations. A hypothesis towards tailored metal-oxide interface for improving oxide reducibility will also be revealed. Finally, we will also discuss an “one step metallurgy” concept conceived to dissolve some of the classical borders between extractive and physical metallurgy.