Here's an article from Harrison's website:
A commonly asked question is why is there such a large disparity in price between two similar looking titanium heads? Excluding mark up and promotional expenses, the best way to separate the two is by comparing how they are made. There are two popular methods used to make titanium driver heads: forged vs. cast.
The forged head derives its name sake from the use of a 500 ton press in its production process. For all fairness, the forged Ti heads are at best mid-labeled. It was actually made by cutting and stamping a sheet of titanium sheet into several differently parts of the driver, and then welds them together with an Arc welder. The most common construction is a 4-piece body, under which the driver head is made up of the crown, sole plate, face and hosel. The face could be made of Beta Ti or 6-4 Ti, the crown 6-4 Ti, and the sole grade 9 Ti. Grade 9 Ti is usually used because it is softer and easier to form the intricacies that are common with a typical sole plate design.
The principle benefit of the stamping process is low production cost. The disadvantages are limited design complexity, poor reproducibility and dimensional accuracy. In addition, with the massive amount of weld line inside the club head, perimeter weighting is impossible to nail down. Its center of gravity is more or less a case of probability than predictability.
The cast Ti driver usually has a 2-piece body. The main body and the club face. The main body is made out of 6-4 Ti and the club face could be either Beta Ti or 6-4 Ti. The face is attached to the body by either an Arc weld or Plasma weld process. The preferred method is Plasma welding as it is much hotter than Arc weld. It creates better bound and a thinner weld line. The titanium investment casting is a lost wax process, not unlike its counter-part in casting stainless steel parts. However, it requires a melting furnace and a separate vacuum casting furnace. These furnaces and related factory fixtures require substantial capital investment.
The benefits of investment casting are thinner wall thickness, complex geometry, reproducibility and dimensional accuracy. The main disadvantage is that its production cost is nearly twice that of the stamping process. Nearly all top of the line name brand titanium drivers are made with the investment casting process for its consistency and accuracy. The great majority of the component Ti driver heads are stamped.
I found it interesting that forged vs cast is opposite for drivers where cast is more expensive and better. Next thing I'll look up is what the difference is between beta Ti, 6-4 Ti, and 9 Ti in regards to feel and forgiveness.
So does anyone know, does "forged" actually make the Razr inferior to other drivers? I'm more willing to believe the composite material they use is light weight and easier to forge to specs, but why advertise it as forged when a five minute google search shows casting is better?