Yes, it is right. The difference is that in the case of aluminium and titanium (but also stainless steel), the oxide grows in a uniform way, covering all the metal. These protective layers are very thin and act as barriers stopping oxygen from reaching the metal underneath.
In case of iron, oxidation occurs at different points on the surface and the oxide layer initially leaves most of the metal exposed. The oxide is also not effective at stopping oxygen, so the rust layers keeps growing until it forms flakes that fall, exposing more of the metal. The process repeats until all the metal is consumed.
In case of iron, oxidation occurs at different points on the surface and the oxide layer initially leaves most of the metal exposed. The oxide is also not effective at stopping oxygen, so the rust layers keeps growing until it forms flakes that fall, exposing more of the metal. The process repeats until all the metal is consumed.