Well at risk of muddying the waters a little.
You can have a titanium impregnanted resin used in the blank. I this known as nano titanium, it improves the adhesion of the resin, allowing you to use less resin, increasing the carbon content of the blank. Which in turn creates a lighter blank with a greater hoop strength (stronger, less likely to fold/break) and a faster rather than stiffer action.
Graphite Modulus, I found this online at www.Fly Anglers Online which explains Modulus well.
"Modulus is a term that describes the stiffness to weight ratio of the graphite that's used to create the rod blank. When you cast a line, the rod flexes with the weight of the line, storing energy as it flexes. When the motion of the rod stops, the rod reflexes and releases all of its stored energy to propel the line. When you increase the modulus of the graphite, you increase the ability of that graphite to store and release energy. You also increase the speed that the rod releases the stored energy. That in turn, increases the line speed that is generated in the cast. Increase the modulus, and you increase the reaction speed and power of the rod blank." In short high modulus carbons proform better, but can be more brittle/ less able to survive impacts.
Fast taper refers to a tip action rod. So most of the loading is in the first third (from the tip). Which shouldn't be confused with fast action, which refers to the speed of recovery of the blank when a load is removed.
You can have a titanium impregnanted resin used in the blank. I this known as nano titanium, it improves the adhesion of the resin, allowing you to use less resin, increasing the carbon content of the blank. Which in turn creates a lighter blank with a greater hoop strength (stronger, less likely to fold/break) and a faster rather than stiffer action.
Graphite Modulus, I found this online at www.Fly Anglers Online which explains Modulus well.
"Modulus is a term that describes the stiffness to weight ratio of the graphite that's used to create the rod blank. When you cast a line, the rod flexes with the weight of the line, storing energy as it flexes. When the motion of the rod stops, the rod reflexes and releases all of its stored energy to propel the line. When you increase the modulus of the graphite, you increase the ability of that graphite to store and release energy. You also increase the speed that the rod releases the stored energy. That in turn, increases the line speed that is generated in the cast. Increase the modulus, and you increase the reaction speed and power of the rod blank." In short high modulus carbons proform better, but can be more brittle/ less able to survive impacts.
Fast taper refers to a tip action rod. So most of the loading is in the first third (from the tip). Which shouldn't be confused with fast action, which refers to the speed of recovery of the blank when a load is removed.
