Stiletto is well known for its titanium framing hammers, which Tim Uhler reviewed last year. In the video below you’ll get to see how a Stiletto flatbar is made. Stiletto product developers walk through the steps from sketching a concept drawing (sometimes on a napkin), creating a 3-D image in a CAD program, building a plastic model with a Stereolighography (SLA) machine, then casting the tool in titanium. Before mass production happens the tool undergoes some serious testing, though. As you’ll see, that testing far exceeds any wear and tear likely to occur on the jobsite.
For those of you interested in taking a deeper dive into the chemistry of making pure titanium (and some insight into why these prybars are so expensive), the video below offers some discussion within the first 2 min. At minute 3:45 there's a demonstration weighing the prybar (17 oz.). The rest of the review is rather light on useful information for those in the professional trades - but the chemistry discussion will be interesting to some so I thought it worth sharing.