FFF (fused filament fabrication) is among the most popular additive manufacturing techniques; nevertheless, enhancing production efficiency without any degradation in mechanical properties is still a major issue. While numerous studies have investigated the influence of print speed and print temperature, the relationship between them, especially at higher print speeds, has not been researched extensively. Thus, the current research seeks to investigate the impact of high printing speed and temperature on the energy absorption capacity of FFF-printed structures in three repetitions. There was no deterioration of the energy absorption capability when printing speed was increased from 50 mm/s to 450 mm/s. At 230 °C, the specimen with a printing speed of 450 mm/s gave the highest total energy absorption (TEA) and specific energy absorption (SEA) of 31.4 J and 5.17 J/g, respectively, which were about 4.6% and 4.3% higher than those at a speed of 50 mm/s. In light of manufacturing time, normalized TEA and normalized SEA have risen by about 22.0% and 21.7%, respectively. The results confirm a pronounced interaction between printing speed and nozzle temperature, suggesting that high-speed FFF has the potential to increase manufacturing efficiency while maintaining and potentially improving the energy absorbing properties of PLA structures.
