Dual-phase steelsSteel are a type of advanced high-strengthStrength steelSteel used in the automotive industry. From a martensitic microstructureMicrostructure, a thermal processProcess was applied to an experimental Mo–V alloyed dual-phase steelSteel to evaluate the effects of the thermal route, mainly on the microhardness. The processProcess consisted of an intercritical annealingIntercritical annealing step and a subsequent temperingTempering step, which was compared to a conventional intercritical treatment route. The resulting microstructureMicrostructure was analyzed using optical and scanning electron microscopyScanning Electron Microscopy (SEM), as well as Vickers microhardness measurements. The microstructureMicrostructure of the steelSteel, under conventional conditions, exhibited a microstructureMicrostructure composed of ferrite and martensiteMartensite, similar to that observed in the tempered processProcess. However, due to the effect of temperingTempering, secondary hardening is present, resulting from the precipitationPrecipitation of alloy carbides, and consequently, the microhardness changes. The thermal route with temperingTempering aims to achieve uniform microhardness in DP steelSteel.