Not sure why it must be titanium, but the older Focal tioxid tweets may work. Not sure of the recommended XO frequency though.
I still see NOS on eBay and smaller dealers some times
During my studies i've studied a bit the kart chassis frame aging... they loose a part of their performance if the tubes have more than one good season due to the metal fatigue (the chassis looses a part of his elastic properties that are essential for a non damped car)
I prefer a fresh new dome !
You need to see the distortion data, not just go on Fs and response.
If it must be titanium, Zaph rates this very highly , albeit at $16 :
"A very nice performing low cost tweeter. In fact it's only downfall
is a slightly rough top end that's not likely to be audible. Very clean
operation on the low end, particularly for a small neo tweeter.
It's a value leader in this price range. Tested May 2008."
He uses it down to below 2KHz it smaller designs, and lifts the x/o
point somewhat for designs that nominally provide more max SPL.
Tangband do one. Not sure the price tho.
Ahhh, I wasn't understanding you wanted this for a car.
Not Ti, but Scanspeak makes a number of small profile tweeters in ring radiator, soft dome and Be varieties. Not inexpensive like the Vifa Ti dome though.
Yep, I know ring radiators are textiles. Was just thinking outside of the box if Ti was not the requirement. I've never seen anyone ask specifically for Ti.
If it's a metal driver though, Scanspeak makes some very nice Be tweeters under $300.
Maybe you should try to relax your strict specs a little if you want to build those cabinets someday.
You can't have all at once.
I don't want beryllium it's a poison, an extremely toxic material.
I'm looking for something else than aseptised sounding textile domes.