Callaway's new golf driver face combines titanium, carbon fiber, and a military-grade polymer found in an unlikely way

Callaway's new golf driver face combines titanium, carbon fiber, and a military-grade polymer found in an unlikely way

Golf driver faces have been almost exclusively titanium for more than three decades, with some detours into carbon fiber. Callaway tried one of those detours itself with the all-composite C4 in the early 2000s. Its new Quantum drivers take a different approach to the problem: keep the titanium, add the carbon, and bond the two with a polymer the company describes as “military-grade.” The layered build, which Callaway is calling the Tri-Force Fac…