Ernie Ball Coated Electric Titanium RPS Hybrid Slinky Set, .009 - .046 Titanium reinforced Treated with a micro-thin layer of enamel to prevent decay and corrosion All wound Ernie Ball strings are treated with a micro-thin layer of enamel that prevents decay and corrosion up to five times more than uncoated sets In addition to treating the wound guitar strings, Ernie Ball has taken it a step further by reinforcing the plain guitar strings with a patented winding of titanium wire Titanium's inherent strength prevents string breakage, string slippage, and is proven to keep your strings in tune better than conventional plain strings