Rottweilers and Chows are both high-energy breeds that tend to be wary of strangers, so a Rottweiler and Chow mix is likely to have those personality traits. Courage, steadiness and intelligence are other traits that Rottweilers and Chows share.
Rottweilers are a herding breed, so a dog who is part Rottweiler may display herding behaviors, such as pushiness or nipping. The American Kennel Club considers timid or shy behavior serious faults in both breeds, so a bold but reserved dog can be expected. Both breeds have been bred to be guard dogs, so a mix may be aggressive to strangers or visitors. However, early training and socialization can mitigate this behavior.