A method for counteracting tensile stress in an article , comprising: contacting the article with a fixture , said fixture including a first compression member , a second compression member , and a first position lock , including contacting the first compression member having a first compressive surface including a first mating conformation in contact with a first surface of the article ; contacting the second compression member having a second compressive surface including a second mating conformation in contact with a second surface of the article ; and reversibly locking the first position lock connecting the first compression member to the second compression member , fixing the first compression member relative to the second compression member , the first position lock including a first material composition ; heating the article ; thereby applying compressive stress to the article along a compressive stress vector , the compressive stress vector including a compressive stress vector component opposite in direction to a tensile stress vector of a thermally-induced tensile stress of the article , wherein the compressive stress is applied by thermally-induced autogenous pressure applied by the fixture contacting the article , wherein the first material composition includes a lower thermal expansion coefficient than the article , and expands less than the article during the heating, applying the compressive stress to the article . contacting the article with a fixture , said fixture including a first compression member , a second compression member , and a first position lock , including contacting the first compression member having a first compressive surface including a first mating conformation in contact with a first surface of the article ; contacting the second compression member having a second compressive surface including a second mating conformation in contact with a second surface of the article ; and reversibly locking the first position lock connecting the first compression member to the second compression member , fixing the first compression member relative to the second compression member , the first position lock including a first material composition ; contacting the first compression member having a first compressive surface including a first mating conformation in contact with a first surface of the article ; contacting the second compression member having a second compressive surface including a second mating conformation in contact with a second surface of the article ; and reversibly locking the first position lock connecting the first compression member to the second compression member , fixing the first compression member relative to the second compression member , the first position lock including a first material composition ; heating the article ; thereby applying compressive stress to the article along a compressive stress vector , the compressive stress vector including a compressive stress vector component opposite in direction to a tensile stress vector of a thermally-induced tensile stress of the article , wherein the compressive stress is applied by thermally-induced autogenous pressure applied by the fixture contacting the article , wherein the first material composition includes a lower thermal expansion coefficient than the article , and expands less than the article during the heating, applying the compressive stress to the article . <EOS>