 This study investigated the effects of graphene oxide and glass fiber reinforcements on the 3D-printed polyamide 6, Pa6. The goal was to improve the interfacial bond and interlaminar strength of the 3D-printed material in both ambient and high-temperature environments. The study found that the addition of graphene oxide and glass fiber reinforcements increased the tensile strength of the 3D-printed material in both ambient and high-temperature environments. In particular, the addition of graphene oxide resulted in the greatest increase in tensile strength in the wet environment. Therefore, the use of graphene oxide and glass fiber reinforcements can be beneficial when designing 3D-printed parts that are exposed to moisture or extreme temperatures. This article was authored by Mariah Echakba, Matthew Goodyear, Jake Duthey, and others.