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Perhaps it's because of my niche, but I hated to even see titanium anywhere near my reagent list. If it was in a catalyst, you just assumed it reacts with water even more violently than the product. If it had to end-up in the end product, I just assumed it'll need to be condensed and chilled below -30 C or else it'll explode or turn the teflon plumbing into serpents. It doesn't surprise me to learn that the metal is equally uncooperative when machining or purifying. The aside on PV solars lacks the nuance of the rest of the article, but it's good overall as far as I can tell. Thanks for posting it, I could try filling some of that in when my schedule clears a bit.