Last week @jaco_flans brought me my new Flansberrium Titanium frame (and an aluminium one) and luckely we were able to ride together yesterday. I borrowed him the new titanium frame 
First I tested it myself at thursday (the two pictures after the frame)
Pictures of the frame by @jaco_flans
Damn, that frame does look gorgeous ! @jaco_flans sure knows how to turn metal tubing into magic.
How does it ride ? (especially rigidity wise). I have heard that titanium can be quite flexible and feel like riding on a spaghetti. I know he has worked on it, but I am really curious to what extent he has solved this problem.
He uses a thicker tube than on his prototype one and now it is very rigid, thatās why I let him ride it, so he could compare it and he said it is a huge difference. But maybe he will write himself
I love it, it rides very well, no flex.
Nice! What about the weight? 
Iād also like to see a titanium V-frame, with the front part being made of carbon so that itās light and stiff 
Itās not much lighter than an aluminium, but I would say it is more rigid (Jakob knows the weight difference)
Seeing the shape of this frame, and thinking of the old Triton frames (not the 3d printed Tritao one) I wonder if titanium is virtually impossible to bend. Maybe itās just a coincidence that they both feature the same crown style. Maybe thereās a reason linked to the material used. @jaco_flans, can you shed some light upon this?
Why is there a weld in the tube where the seatpost goes in?
Nice, but why a quick release clamp collar for wheel bearing mount? Travel portability?
A typical split collar with bearing groove and two bolts is rock solid.
there are some reasons: easy and fast and no loose parts when I have to change the inner tube because of a flat ( I have that a couple times a year) and also for changing wheelsets ( I have three of them: flikflok, schlumpf, fixed) and they look very nice
Iām happy Markus let me ride it this weekend. Since the day I made my first Titanium frame I didnāt like it, it was like a riding a spaghetti. This one uses thicker tubing and is much more rigid and feels very good. I would ride it haha.
My first frame was about 450g, but also way too flexible. This one is 687g, including bearing caps and bolts, 210mm neck and for 29ā wheel. The same sized frame in aluminium is 705g. The difference is minimal, but Titanium has more sexiness points.
You can bend Titanium, not with the tools I currently have 
One hard thing with uni frames is that we want as narrow as possible at the top so we dont hit our legs when riding, bending oval tubing is even harder than round tubing. This shape makes it easier to reduce the width, and I also think it looks a lot cooler than a round crown. I do have a Triton Sponge at home, and to me, itās one of the most beautiful frames out there.
Thinner tube at the bottom, thick at the top so it fits a 27.2 seatpost without a shim 
Dont worry, those are also Rock Solid 
As Markus said, no loose parts when you take your wheel out, threaded nuts are also replacable in case youād strip one, itās lighter, and it looks better (IMO).
Thanks Markus for sharing your new baby 
They do look rather nice (as I have probably said before )ā¦. is there potentially any issue with these specific ones with lots of dissimilar metals ā the top looks like machined titanium, the bottom looks like aluminium, the threaded inserts are presumably steel, with stainless (guess) screws and whatever the bearing casing is made out of.
This is kindāof a guessing game on my side. I have done lots of reading, but I cannot find a true answer because it has too many factors to take in consideration. I try to base also on personnal experience, I have a couple unicycles here that have ridden in very rough conditions (Canadian winters with road salt for example!) and I use these to judge what I will choose. Anyone who is riding is harsh conditions should grease or lube any assembled part. Really everything should have a little grease 
The top part is made out of whatever the frame material is (aluminium, 4130 Steel or Titanium (I even made some Stainless Steel ones for @Ken_Looi )). The barrel nuts are aluminium and are anodized. The lower part is aluminium, the screws are Stainless.
Is it risky? Maybe. Have I had any issue or heard of any issue? Not at the moment. Should we worry? Probably not that much.
Could it be made out of titanium ? It would allow for some crazy electro anodizing frames with nice constancy in the patterns / colorsā¦
Iām thinking sponge anodizing
Thatās fair enough. I just thought Iād ask if you knew of any issues ā I was totally unaware that titanium could cold weld until I put a bottle cage on a titanium bike frame with titanium screws and read that that could be an issue, how real an issue I donāt know. I think I had seen it could be an issue with aluminium too, but it probably a fairly exotic process. As you say, a bit of grease probably keeps problems at bay though.
Cold welding, also called galling, can definitely happen in any pairing of titanium, aluminum and stainless steel. All of them form their own oxide layers, but if youāve got threads or spots with a lot of pressure and friction, that layer can get scraped off. When the raw metal underneath touches, it can basically stick or fuse together. Anti seizing paste or other lubrication can help to avoid this.
I am definitely in team grease:
Just make sure to clean threads and remove the old grease before adding more. Dust and sand in the threads can make galling way more likely.
Clean, Grease, Ride, Repeat 
Are those door handles? I wanted to ask to get a pair of such fancy cranksā¦
Iām pretty sure they are bike cranks (but I just searched on the internet for ātitanium electro anodizationā.
BTW, I just remembered that @jaco_flans as recently announced some cranks (machined out of aluminium), and can apparently machine titaniumā¦
Does it mean he could (at least in theory) make titanium cranks ? That could make a crazy looking unicycleā¦
here are similar bike cranks
but the pipe in the middle is just to keep both cranks together for the sale or what? It is not a hub. I mean how do you otherwise connect it to the bike.
And something else, since titanium is already very strong and doesnāt rust, what is the point of anodizing other than because it looks cool?
Oh and last question, what would the price be of titanium ISIS cranks?
