Hydrolytically Stable Polyarylene Sulfide Composition

A polymer composition comprising 100 parts by weight of a polymer matrix that includes at least one polyarylene sulfide and from about 30 parts by weight to about 120 parts by weight of inorganic fibers, wherein the polymer composition exhibits an initial tensile strength and an aged tensile strength after exposure to a solution containing 50 vol. % deionized water and 50 vol. % of ethylene glycol at a temperature of 135° C. for 1,000 hours, wherein the ratio of the aged tensile strength to the initial tensile strength is about 0.8 or more, wherein the initial tensile strength and the aged tensile strength are determined at a temperature of 23° C. in accordance with ISO 527:2019.