Do they stack?
I had an 10% Movement Speed title and then I bought 5% Movement Speed and I feel faster than with 10%
Then I asked someone in game and he said that they don't but then again he don't know so maybe some of them stack.
The question is...
How many titles can you wear?
Does it depend on Amaterasu partner level?
<-- is that what it stands for?

You should only be capable of having the benefits of one title. If you feel faster then it's either a glitch or an illusion I suppose.
The description is merely an awkward wording to say that when you increase that partner level, you unlock more titles to choose from, not how many you can have at one time.

SeekerFate wrote:You should only be capable of having the benefits of one title. If you feel faster then it's either a glitch or an illusion I suppose.
The description is merely an awkward wording to say that when you increase that partner level, you unlock more titles to choose from, not how many you can have at one time.

Well that would kinda suck, if we could only have 1 title.
So it's a myth.