Internationalization emphasizes the relationship between and among nations, people, cultures, institutions, systems while globalization stresses the concept of worldwide flow of economy, ideas, culture, etc.
/ˌɪn.t̬ɚˌnæʃ. ən. əl.əˈzeɪ.ʃən/ the action of becoming or making something become international: The research shows surprisingly strong support for the internationalization of business and culture.
Put simply, globalization is a process used by a company to bring its business to new locales, whereas internationalization refers to the act of designing a product or service in a way that makes the expansion into international markets a simpler process.
Globalization and internationalization go hand in hand.