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Strict environmental regulations in the automotive industry, mainly for reducing CO2 emissions, has motivated metallurgical researches in developing a wide range of new steel grades that can allow the reduction of weight of automotive parts without compromising its structural integrity while in service.1) These new steel grades, such as the Dual Phase (DP) Advance High Strength Steels (AHSS), have attracted great industrial interest due to their adequate balance in mechanical properties i.e. toughness, strength and ductility.2) However, the high strength and toughness of these steels may imply difficulties for their production. Also, considering the microstructural changes that accompany the plastic deformation of these steels, it is wise to have full understanding of its behavior at critical processing temperatures and strain rates. Localized strains due to the anisotropy of the structure and distribution of phases may lead to the formation of weak spots which can provoke failure of the work piece during processing. Therefore, it is necessary to understand their plastic behavior as a function of microstructure, temperature, strain and strain rate, in order to avoid unstable or “unsafe” processing routes. During hot deformation (such as in the process of hot rolling), the microstructure of metals goes through a series of changes, which influence its plastic behavior. Thus, one of the most important goals in hot deformation is to Determining Hot Deformation Behavior of an Advance High Strength Steel (AHSS) by Means of Dynamic Processing Maps