Have you seen the inside of a modern Silencer Central product? My silencers are simple cans with baffles that fall right out. Like a flashlight full of little metal funnels. I can't do the pretty decorations on the outsides, and I can't make anything as finely finished as factory silencers, but on the other hand, I am not a Chinese Silencer Central competitor who has 5 decades of CNC experience and plenty of capital. This is not a hard project for a pro. No machinist ever says, "I got fired from Silencer Central, so I had to go work for Lockheed." All the machining on these things probably takes less than 15 minutes per unit.
Are you a machinist? Amateur machinists cut titanium all the time, and I would think any machinist would know that, so I am surprised by your question. By a funny coincidence, I have machined Inconel. Just one piece. Can't recall what I did with it. I've made a few doodads from other types of stainless. No problems.
Personally, I have never bought metal by the pound. That's how scrap is sold. New metal suppliers sell shapes and materials cut to length. Nobody says, "I want to make a shaft extension for a motor, so I guess I'll take three pounds." I've always told dealers to cut this or that length. I give them lists. I've never seen a scale at a retail dealer's business. Just band saws.
It seems odd that you mentioned weight. Maybe you know something I don't. Maybe Silencer Central buys so much titanium, they weigh it on truck scales.
I'll assume your prices are right, but I'll also assume that a big manufacturer would get good prices on big orders. So $10 per pound, which justifies a $1500 bill? Assuming lots of waste, it adds up to maybe $50 for my biggest can. I'm not sure how this supports $1000+ suppressor costs. I doubt 90% of the metal is wasted, since titanium comes in tubing form. Are you saying a silencer manufacturer would buy bar stock, drill it lengthwise, and then bore it to size? I find that hard to believe. That would be a colossal pain. The added time and the cost of the associated tooling and consumables would be problems a manufacturer would look to avoid.
As for baffles, you would lose a lot, but I don't think it would be 90%. I'll bet it's a little lower. Chuck a bar. Cut funnel from it. Part off. Rechuck bar. Cut another funnel from it. I suppose you would have to drill baffles because no supplier is going to give you a fat bar with a 0.35" bore in it, but I don't know. A 0.35" bore is a lot easier to create than a 1" bore that holds baffles.
A nice pistol is much harder to make than a silencer, and you can get great examples for $600.
My .22 silencer cost me over $700. It weighs 4.3 ounces.
I should have looked more closely at the French site, but those prices are still great by US standards, and they probably include the French 20% VAT.