Can I define ion-title outside ion-navbar (i.e. in ion-content)?

I want to define ion-header in only one separate file in order to use it for multiples screens.
But I want to define title in each screen.

With ionic 1, to do that, I define ion-nav-title in ion-view like explain here: https://ionicframework.com/docs/api/directive/ionNavTitle/

It seems to not be possible with ion-title in ion-content with ionic 2: https://ionicframework.com/docs/v2/api/components/toolbar/Title/

I’m right? Do someone in ionic team plan to make it possible? Is there a trick to do this?

Thanks,

Julien