HEAD Ti. S6 Power Series. The best selling racquet in the history of HEAD. This explosively powerful, lightweight racquet with titanium/graphite construction is ideal for players with a short, compact swing. Stiff construction provides increased power and better handling while an ultralight swingweight maximizes maneuverability. This racquet is prestrung with Head Synthetic Gut 16 Natural. Technology HEAD Titanium Tennis – The Power of Light: A composite weave of ultra-strong titanium and ultra-light graphite fibers provide maximum weight reduction, optimal stiffness and power.