Tire wear on outside front tires, car shows no sighns of needing alighnment when I'm driving. What would cause this, could is still be the alighnment although it drives straight ?

Yes, good idea to get an alignment anytime abnormal tire wear is noticed... Every couple of years wouldn't hurt a thing, most people don't do that but with repeated driving on 'some' of our roads and highways it's usually necessary.