Yes its possible. As Wikitude does provide plugins for cordova. In-case you are interested to integrate the wikitude SDK in your ionic you need to do the following
Download the cordova plugin from wikitude site
Create wrapper like "ngCordova for wikitude", because you need to convert those wikitude normal js to angular style code. so take an example of any ngCordova plugin and migrate wikitude JS code to something similar to that. Even you don't want this, you can directly access the wikitude functions from angularJS service.
Links to know the wikitude documentation
http://www.wikitude.com/developer/documentation/phonegap
Links to download wikitude plugin
http://www.wikitude.com/products/extensions/cordova-plugin-augmented-reality/