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Mitosis is a dynamic process. For purposes of description it is typically broken down into phases which are briefly described below:
Prophase: Chromosomes condense; nuclear membrane breaks down; mitotic spindle begins to form; kinetochores begin to migrate to demarcate the two poles.

Prometaphase: Spindle apparatus completes formation; sister chromatids are attached to spindle fibers via polar microtubules.

Metaphase: Chromosomes are aligned at the center of the cell.

Anaphase: Homologous chromosomes separate and migrate to opposite poles.

Telophase: Nuclear membrane forms around each set of chromosomes; chromosomes decondense.

Although not a part of mitosis, the division of the cytoplasm, called cytokinesis, typically occurs after anaphase.