Callaway ERC Fairway Wood. ERC fairway woods feature a forged titanium 5-piece design that incorporates a cup-face construction for higher ball speed. Uses Callaway's Variable Face Thickness (VFT) Technology which allows manufacture of a very thin - yet strong - clubface. The 'ERC' in Callaway's ERC Forged titanium fairway wood are the initials of Callaways founder - Ely Reeves Callaway.