def append_to_title(title: str, append_title: str) -> str:
    """
    Append a title to a title avoiding duplication in title text, i.e. 'Steps Steps'.

    :param title: Title to append to.
    :param append_title: Other title to append to the title.
    :return: The appended title without title duplication.
    """
    if title == append_title:
        return title
    return f'{title} {append_title}'