How many titan shifters can harden their skin?


I've just watched the anime series and in it, we've just seen the female titan
and the armored titan being able to harden their skin. But reading in the
internet I've found that

> In the manga Eren can harden his skin and so does the Beast Titan

is there any other titan shifters who can harden their skin? How many titan
shifters can harden their skin?




This link explains all the abilities of every Titan :-

[Titan Abilities](https://www.animeshirtclub.com/blogs/news/attack-on-titan-
all-9-titan-shifters-powers-explained)

The titans that can Harden are :-

  1. Beast Titan
  2. Female Titan
  3. Armoured Titan(dunno if you can call this hardening but he has hardened skin afterall!!).
  4. Attack Titan




This link explains all the abilities of every Titan :-

[Titan Abilities](https://www.animeshirtclub.com/blogs/news/attack-on-titan-
all-9-titan-shifters-powers-explained)

The titans that can Harden are :-

  1. Beast Titan
  2. Female Titan
  3. Armoured Titan(dunno if you can call this hardening but he has hardened skin afterall!!).
  4. Attack Titan

