A method for forming a mixed microconstituent steel alloy comprising: a. supplying a metal alloy consisting of Fe at a level of 61.0 to 81.0 atomic percent, Si at a level of 0.6 to 9.0 atomic percent, Mn at a level of 1.0 to 17.0 atomic percent and optionally Ni at a level of 0.1 to 13.0 atomic percent, optionally Cr at a level of 0.1 to 11.0 atomic percent, optionally Cu at a level of 0.1 to 4.0 atomic percent, optionally C at a level of 0.1 to 4.0 atomic percent, optionally B at a level of 0.1 to 6.0 atomic percent and optionally impurities at a level up to 10 atomic percent; b. melting said alloy and cooling and solidifying and forming an alloy that has a matrix grain size of 5.0 μm to 1000 μm and boride grains, if present, at a size of 1.0 μm to 50.0 μm; c. deforming said alloy formed in step (b) at an elevated temperature ranging from 700 °C up to a solidus temperature of said alloy, and exposing said alloy to a stress that exceeds its elevated temperature yield strength and which is in a range of 5 MPa to 1000 MPa to form_an alloy that has matrix grains at a size of 1.0 μm to 100 μm, boride grains, if present, at a size of 0.2 μm to 10.0 μm and precipitation grains at a size of 1.0 nm to 200 nm; and d. exposing said alloy formed in step (c) to mechanical stress by cold working, wherein said mechanical stress exceeds the yield strength; wherein said mechanical stress is applied to said alloy formed in step (c) by cold working; following step d. said alloy contains mixed microconstituent structure comprising: (a) a first group of matrix grains of 0.5 μm to 50.0 μm, boride grains, if present, of 0.2 μm to 10.0 μm, and precipitation grains of 1.0 nm to 200 nm; (b) a second group of matrix grains of 100 nm to 2000 nm, boride grains, if present, of 0.2 μm to 10.0 μm and precipitation grains of 1 nm to 200 nm. a. supplying a metal alloy consisting of Fe at a level of 61.0 to 81.0 atomic percent, Si at a level of 0.6 to 9.0 atomic percent, Mn at a level of 1.0 to 17.0 atomic percent and optionally Ni at a level of 0.1 to 13.0 atomic percent, optionally Cr at a level of 0.1 to 11.0 atomic percent, optionally Cu at a level of 0.1 to 4.0 atomic percent, optionally C at a level of 0.1 to 4.0 atomic percent, optionally B at a level of 0.1 to 6.0 atomic percent and optionally impurities at a level up to 10 atomic percent; b. melting said alloy and cooling and solidifying and forming an alloy that has a matrix grain size of 5.0 μm to 1000 μm and boride grains, if present, at a size of 1.0 μm to 50.0 μm; c. deforming said alloy formed in step (b) at an elevated temperature ranging from 700 °C up to a solidus temperature of said alloy, and exposing said alloy to a stress that exceeds its elevated temperature yield strength and which is in a range of 5 MPa to 1000 MPa to form_an alloy that has matrix grains at a size of 1.0 μm to 100 μm, boride grains, if present, at a size of 0.2 μm to 10.0 μm and precipitation grains at a size of 1.0 nm to 200 nm; and d. exposing said alloy formed in step (c) to mechanical stress by cold working, wherein said mechanical stress exceeds the yield strength; wherein said mechanical stress is applied to said alloy formed in step (c) by cold working; following step d. said alloy contains mixed microconstituent structure comprising: (a) a first group of matrix grains of 0.5 μm to 50.0 μm, boride grains, if present, of 0.2 μm to 10.0 μm, and precipitation grains of 1.0 nm to 200 nm; (b) a second group of matrix grains of 100 nm to 2000 nm, boride grains, if present, of 0.2 μm to 10.0 μm and precipitation grains of 1 nm to 200 nm. said mechanical stress is applied to said alloy formed in step (c) by cold working; following step d. said alloy contains mixed microconstituent structure comprising: (a) a first group of matrix grains of 0.5 μm to 50.0 μm, boride grains, if present, of 0.2 μm to 10.0 μm, and precipitation grains of 1.0 nm to 200 nm; (b) a second group of matrix grains of 100 nm to 2000 nm, boride grains, if present, of 0.2 μm to 10.0 μm and precipitation grains of 1 nm to 200 nm. (a) a first group of matrix grains of 0.5 μm to 50.0 μm, boride grains, if present, of 0.2 μm to 10.0 μm, and precipitation grains of 1.0 nm to 200 nm; (b) a second group of matrix grains of 100 nm to 2000 nm, boride grains, if present, of 0.2 μm to 10.0 μm and precipitation grains of 1 nm to 200 nm.