Why can grizzly bears be tamed?

Because they are conditioned to behave in a particular way by the owner since a very young age. In Southeast Asia, elephants are used as a mode of transportation. Tourist are often amazed at the fact that the elephant handlers use small ropes tied to the ground with tiny sticks to keep an elephant in place. read more

As Brett Williams wrote, grizzly bears cannot be tamed, but they can be trained to interact with certain humans in monitored situations. To address the subtext of your question: you may be referencing the story of Casey Anderson and Brutus, who served as "best man" in Anderson's wedding. read more

The more experience you can get with one before it's just you and the bear alone, the better. That will make a lot less trial and error to get it right the first time. Otherwise, you'll have a very large animal that you can only look at, and cant touch. read more

A grizzly bear can be tamed if raised from infancy; an adult in the wild cannot be tamed. And even a tame grizzly bear will still be dangerous, although not as dangerous as a wild grizzly bear. read more