A method for producing a hot dip galvanized/galvannealed steel sheet, the steel sheet consisting of the following elements by weight percent: 0.15-0.5% carbon; 1-3% manganese; 2% or less silicon, aluminum, or some combination thereof; 0.5% or less molybdenum; 0.05% or less niobium; and the balance being iron and other incidental impurities; or 0.15-0.4% carbon; 1.5-4% manganese; 2% or less silicon, aluminum, or some combination thereof; 0.5% or less molybdenum; 0.05% or less niobium; and the balance being iron and other incidental impurities; the method comprising the steps of: (a) heating the steel sheet to a first temperature, wherein T1 is at least above the temperature at which the steel sheet transforms to austenite and ferrite; (b) cooling the steel sheet to a quench temperature by cooling at a cooling rate, wherein the quench temperature is below the martensite start temperature (Ms) as defined by Andrew's linear expression, wherein the difference between the quench temperature and Ms being sufficiently great to form an adequate amount of martensite yet being sufficiently low to avoid consuming too much austenite, wherein the cooling rate is sufficiently rapid to transform austenite to martensite, to avoid the formation of non-martensitic transformation products; (c) re-heating the steel sheet to a partitioning temperature, wherein the partitioning temperature is sufficient to permit diffusion of carbon within the structure of the steel sheet; (d) stabilizing austenite by holding the steel sheet at the partitioning temperature for a holding time, wherein the holding time is of a period of time sufficient to permit diffusion of carbon from martensite to austenite; (e) subjecting the steel sheet to a hot dip galvanizing or galvannealing process during the step of stabilizing austenite; and (f) cooling the steel sheet to room temperature. 0.15-0.5% carbon; 1-3% manganese; 2% or less silicon, aluminum, or some combination thereof; 0.5% or less molybdenum; 0.05% or less niobium; and the balance being iron and other incidental impurities; or 0.15-0.4% carbon; 1.5-4% manganese; 2% or less silicon, aluminum, or some combination thereof; 0.5% or less molybdenum; 0.05% or less niobium; and the balance being iron and other incidental impurities; the method comprising the steps of: (a) heating the steel sheet to a first temperature, wherein T1 is at least above the temperature at which the steel sheet transforms to austenite and ferrite; (b) cooling the steel sheet to a quench temperature by cooling at a cooling rate, wherein the quench temperature is below the martensite start temperature (Ms) as defined by Andrew's linear expression, wherein the difference between the quench temperature and Ms being sufficiently great to form an adequate amount of martensite yet being sufficiently low to avoid consuming too much austenite, wherein the cooling rate is sufficiently rapid to transform austenite to martensite, to avoid the formation of non-martensitic transformation products; (c) re-heating the steel sheet to a partitioning temperature, wherein the partitioning temperature is sufficient to permit diffusion of carbon within the structure of the steel sheet; (d) stabilizing austenite by holding the steel sheet at the partitioning temperature for a holding time, wherein the holding time is of a period of time sufficient to permit diffusion of carbon from martensite to austenite; (e) subjecting the steel sheet to a hot dip galvanizing or galvannealing process during the step of stabilizing austenite; and (f) cooling the steel sheet to room temperature. (a) heating the steel sheet to a first temperature, wherein T1 is at least above the temperature at which the steel sheet transforms to austenite and ferrite; (b) cooling the steel sheet to a quench temperature by cooling at a cooling rate, wherein the quench temperature is below the martensite start temperature (Ms) as defined by Andrew's linear expression, wherein the difference between the quench temperature and Ms being sufficiently great to form an adequate amount of martensite yet being sufficiently low to avoid consuming too much austenite, wherein the cooling rate is sufficiently rapid to transform austenite to martensite, to avoid the formation of non-martensitic transformation products; (c) re-heating the steel sheet to a partitioning temperature, wherein the partitioning temperature is sufficient to permit diffusion of carbon within the structure of the steel sheet; (d) stabilizing austenite by holding the steel sheet at the partitioning temperature for a holding time, wherein the holding time is of a period of time sufficient to permit diffusion of carbon from martensite to austenite; (e) subjecting the steel sheet to a hot dip galvanizing or galvannealing process during the step of stabilizing austenite; and (f) cooling the steel sheet to room temperature.