This titanium backplate-style buoyancy control device (BCD) is designed for demanding environments, combining a lightweight structure, high durability, and excellent ergonomics. Its core features an aviation-grade titanium backplate, which provides exceptional strength while significantly reducing weight, making it suitable for travel diving, cave diving, and deep diving missions. The backplate-style structure offers divers a more natural, body-conforming underwater posture, achieving stable neutral buoyancy control with minimal drag. Paired with a high-performance wing-shaped bladder, it provides excellent support both underwater and at the surface. The patented slot plate design allows the center of gravity to be flexibly adjusted according to different wetsuits or drysuits. The standard system supports up to 10 kg of ballast, meeting the needs of diving with drysuits or thick wetsuits. Backplate is made of titanium, effectively preventing seawater corrosion and ensuring reliable performance in harsh environments. The modular design allows divers to flexibly configure bladder size and ballast placement according to mission requirements. The bladder features a double-layer protection design, with a durable outer fabric and reinforced stitching to ensure long-term structural stability.