more damage prone than single strand wires. Titanium fishing fishing leaders are actually titanium-nickel alloys that have several very important features: - titanium leader lines are very flexible, regardless if they are single or multi strand lines/wires, - these lines are very elastic - they can stretch up to 10% without permanent damage to the line itself - perfect for hook setting, - these lines are knottable just as nylon monofilament lines, - surface is rather hard and abrasion resistant - great for fishing toothy fish, - titanium wire is corrosion resistant and can last for a long time, even surpassing stainless steel wires, - due to the strength and elasticity, titanium wires are almost entirely kink-proof. Copper, monel and lead core fishing lines are used as heavy trolling main lines, usually followed with fluorocarbon line near the lure or bait with fishing swivel between the lines. Due to their high density, these fishing lines sink rapidly in water and they require less line for achieving desired trolling depth. On the other hand, these lines are relatively thick for desired strength, especially when compared with braided fishing lines and they often require reels with larger spools. Environmental impact Discarded monofilament fishing line takes up to 600 years to decompose. There have been several types of biodegradable fishing lines developed to minimize the impact on the environment. See also Ultra high molecular weight polyethylene Braided fishing line Fishing Fish hook Fluorocarbon Fly fishing Monofilament line Multifilament fishing line External links Fishing line: How its made, Fishing line: How to put line on spinning reel, References Fishing equipment