i have a titan-1, the original unit! there are no contact information, no warranty card, no information at all... you simply can't get in contact with them.
that's already very shady...
and even if you can get in contact with someone responsible, in china it works like this: you want something replaced, you have to order something else. if they do at all
maybe all the rebranded ones have a real warranty, the retailer has to offer, though
also some of the legit sellers already do try not to honour the warranty, imagine now how much the chinese will give a fuck, if your unit stinks and taste bad
if you have a rebranded one, you have at least someone you can contact, but not sure if they will help you, at least. time will tell, for sure