An alkali aluminosilicate glass having a surface and a thickness t, the glass comprising: a first region under a compressive stress, the first region extending from the surface to a depth of layer DOL in the glass , wherein the compressive stress CS has a maximum CS 1 at the surface and varies with distance d from the surface according to a function other than a complementary error function; and a second region under a tensile stress CT, the second region extending from the depth of layer into the glass. wherein the first region comprises: a first segment , the first segment extending from the surface to a first depth d 1 , wherein the depth d 1 is less than the depth of layer DOL, wherein the compressive stress CS in the first segment varies according to a first complementary error function; and a second segment , the second segment extending from the first depth d 1 up to the depth of layer DOL, wherein the compressive stress CS in the second segment varies according to a second function, wherein the first function is different than the second function, wherein the second function is a second complementary error function or a diffusion tail, wherein the tensile stress CT, expressed in MPa, is greater than or equal to - 36.7ln( t )(MPa) + 48.7(MPa) wherein t is expressed in millimeters. a first region under a compressive stress, the first region extending from the surface to a depth of layer DOL in the glass , wherein the compressive stress CS has a maximum CS 1 at the surface and varies with distance d from the surface according to a function other than a complementary error function; and a second region under a tensile stress CT, the second region extending from the depth of layer into the glass. wherein the first region comprises: a first segment , the first segment extending from the surface to a first depth d 1 , wherein the depth d 1 is less than the depth of layer DOL, wherein the compressive stress CS in the first segment varies according to a first complementary error function; and a second segment , the second segment extending from the first depth d 1 up to the depth of layer DOL, wherein the compressive stress CS in the second segment varies according to a second function, wherein the first function is different than the second function, wherein the second function is a second complementary error function or a diffusion tail, wherein the tensile stress CT, expressed in MPa, is greater than or equal to - 36.7ln( t )(MPa) + 48.7(MPa) wherein t is expressed in millimeters. a first segment , the first segment extending from the surface to a first depth d 1 , wherein the depth d 1 is less than the depth of layer DOL, wherein the compressive stress CS in the first segment varies according to a first complementary error function; and a second segment , the second segment extending from the first depth d 1 up to the depth of layer DOL, wherein the compressive stress CS in the second segment varies according to a second function, wherein the first function is different than the second function, wherein the second function is a second complementary error function or a diffusion tail, wherein the tensile stress CT, expressed in MPa, is greater than or equal to - 36.7ln( t )(MPa) + 48.7(MPa) wherein t is expressed in millimeters. <EOS>