Two-step method for strengthening glass

A method, the method comprising:

• a. contacting an alkali aluminoborosilicate glass with a first ion exchange bath to form a compressive layer extending from a surface of the glass to a depth of layer, wherein the compressive layer is under a compressive stress, wherein the alkali aluminoborosilicate glass prior to the contacting with the first ion exchange bath comprises:
• 5-20 mol % B2O3;
• and 2-8.3 mol % Li2O;
• and
• b. contacting the alkali aluminoborosilicate glass with a second ion exchange bath to replace at least a portion of the alkali metal cations in the compressive layer with a larger alkali metal cation to a second depth that is less than the depth of layer, wherein replacing the alkali metal cations in the compressive layer with the larger alkali metal cation increases the compressive stress, wherein the alkali aluminoborosilicate glass after the contacting with the second ion exchange bath has a crack initiation threshold of at least 6000 gf upon indentation with a Vickers indenter and wherein the surface has a compressive stress of at least 711 MPa, wherein the glass is a glass sheet having a thickness of up to 2 mm.