Abstract: A 3-ton Ti662 alloy ingot with a nominal diameter of Φ720mm, which had undergone three rounds of VAR (Vacuum Arc Remelting) refining, was selected and processed into a bar with dimensions of Φ103×1700mm through a combination of high and low temperature forging with multiple heating cycles. After undergoing STA (Solution Treatment and Aging) treatment, the microstructure and mechanical properties of the bar were evaluated according to the Ti03 standard requirements, and the results showed that all properties of the bar met the standard specifications. Following machining of the bar surface, a 380M portable flaw detector equipped with a 5P14 probe was used to conduct a 100% ultrasonic inspection of the bar using the contact method. Abnormal waveform and high noise signal were found in the local area of the bar material. Upon dissecting these areas and conducting a low-magnification examination, distinct bright spots were observed. Subsequent SEM (Scanning Electron Microscope), EDS (Energy Dispersive Spectroscopy), and HV (Vickers Hardness) analyses were performed on the abnormal areas and the matrix areas using an inverted microscope, scanning electron microscope, and Vickers hardness tester, respectively. The metallographic examination revealed that the microstructure at the bright spots lacked primary α-phase and exhibited typical β-rich segregation. The EDS results indicated that the segregated areas had higher concentrations of V, Fe, and Cu elements, while the concentrations of Al and Sn elements were normal. The Vickers hardness test results showed that the hardness of the segregated areas was lower than that of the normal areas, indicating that the segregation was of the soft type.