I totally agree with you. I have been skeptical of the titanium driver for a long time and always chose between graphene and beryllium, but now I can say that it is really exceptional.
Beryllium (130onm and 600ohm) have a better balance and control between sub-bass and bass and the rest is neutral, of course, 600ohm have better resolution for sure.
Graphene (400ohm) for me has great balance between bass,mids and treble and quality/money value.
I just received 2 more pairs of 130ohm and now I feel sorry because I didn't take at least another pair of titanium 64ohm.
I don't have 32ohm version to compere with it, my favorite in this (32ohm) area is PK2 (14.8mm), Tingo TG-38 and RY4S Plus.
It's a pity that there is not much choice for 14.8mm drivers compared to 15.4mm which suits me more because of their smaller size and fit.
Last night I was listening to my new pair from the previous post.
To build this pair I was inspired by the Bass Reflex Speaker and some Pioneer and JVS earbuds which already use the "back vent" system.
Until now only HE150 and HE150Pro were the references for good sub-bass.
Smabat ST-10 use "transmission line - like" system and I guess their sub-bass is just as good. DUNU DK 4001 also have
a similar concept on the back cover.
The transmission line is a little tricky to calculate for earbuds and I think the length of the T-Line itself should be quite long.
This is the scheme of "simple vent mod" that I used for this project.
With this mod, the Titanium 64ohm sub-bass is 20-30% stronger. I'm not "bass-head" so after a while, this is a bit too much. EDM sounds amazing on this.
Full-size tuning foam covers 3/4 of driver vents and I have noticed that when the volume is low bass is dominant and on high volume, mids take over bass.
For the next step, I plan to remove 1/4 of tuning foam, add side walls dampening and place a cap over the vent to block direct sound wave.
Also trying to find a way to reduce the resonance that is somewhat present. I know the problem is the plastic housing but metal MX500 is not yet available