Composite testing ensures material performance and reliability through various methods. Mechanical tests assess tensile, compressive, and flexural strength, while environmental tests evaluate responses to temperature, moisture, and chemicals. Non-destructive techniques, such as ultrasonic and X-ray imaging, detect internal flaws without causing damage. Fatigue testing simulates cyclic loading for lifespan prediction. Specialized tests like fiber volume fraction and void content analysis provide insights into manufacturing quality. Novel sensors are also developed to measure previously difficult-to-capture phenomena, further advancing testing capabilities.