An apparatus (100, 200) comprising: a fabricating system; a processor; and a memory on which are stored machine readable instructions (112, 114) that when executed by the processor, cause the processor to: control the fabricating system to spread a first layer of build material as part of an object fabrication process, the build material comprising particles or a paste; and control the fabricating system to selectively solidify a first area of the first layer to a higher degree of solidification than a predefined second area encompassed by the first area, wherein the predefined second area has a lower fracture toughness than the first area to propagate a crack in the object more readily than the first area, wherein the instructions (112, 114) are further to cause the processor to: control the fabricating system to form a plurality of predefined second areas in the object, wherein the plurality of predefined second areas are positioned within the object to maximize damage reduction to the object caused by an impact onto the object, characterized in that the locations of the predefined second areas are based upon a shape of the object, the build material used to fabricate the object, a fabrication process implemented and an intended level of impact resistance and/or wherein the locations of the predefined second areas have been determined through testing of various locations and determining locations that result in the maximum damage reduction to the object. a fabricating system; a processor; and a memory on which are stored machine readable instructions (112, 114) that when executed by the processor, cause the processor to: control the fabricating system to spread a first layer of build material as part of an object fabrication process, the build material comprising particles or a paste; and control the fabricating system to selectively solidify a first area of the first layer to a higher degree of solidification than a predefined second area encompassed by the first area, wherein the predefined second area has a lower fracture toughness than the first area to propagate a crack in the object more readily than the first area, wherein the instructions (112, 114) are further to cause the processor to: control the fabricating system to form a plurality of predefined second areas in the object, wherein the plurality of predefined second areas are positioned within the object to maximize damage reduction to the object caused by an impact onto the object, characterized in that the locations of the predefined second areas are based upon a shape of the object, the build material used to fabricate the object, a fabrication process implemented and an intended level of impact resistance and/or wherein the locations of the predefined second areas have been determined through testing of various locations and determining locations that result in the maximum damage reduction to the object. control the fabricating system to spread a first layer of build material as part of an object fabrication process, the build material comprising particles or a paste; and control the fabricating system to selectively solidify a first area of the first layer to a higher degree of solidification than a predefined second area encompassed by the first area, wherein the predefined second area has a lower fracture toughness than the first area to propagate a crack in the object more readily than the first area, wherein the instructions (112, 114) are further to cause the processor to: control the fabricating system to form a plurality of predefined second areas in the object, wherein the plurality of predefined second areas are positioned within the object to maximize damage reduction to the object caused by an impact onto the object, characterized in that the locations of the predefined second areas are based upon a shape of the object, the build material used to fabricate the object, a fabrication process implemented and an intended level of impact resistance and/or wherein the locations of the predefined second areas have been determined through testing of various locations and determining locations that result in the maximum damage reduction to the object. control the fabricating system to form a plurality of predefined second areas in the object, wherein the plurality of predefined second areas are positioned within the object to maximize damage reduction to the object caused by an impact onto the object, characterized in that the locations of the predefined second areas are based upon a shape of the object, the build material used to fabricate the object, a fabrication process implemented and an intended level of impact resistance and/or wherein the locations of the predefined second areas have been determined through testing of various locations and determining locations that result in the maximum damage reduction to the object.