This is true, title is bad on links, on all tag except one, title should only exists on iframe-tag. For screenreaders.

Here's a blog post about hiding the Title property in the built-in Link dialog via an EditorDescriptor: https://world.episerver.com/blogs/Linda-Mohacsi/Dates/2017/10/hiding-properties-in-the-built-in-link-dialog/

Reposting the code in case the blog ever disappears:

    [EditorDescriptorRegistration(
        TargetType = typeof(LinkModel),
        EditorDescriptorBehavior = EditorDescriptorBehavior.ExtendBase)]
    public class EpiLinkEditorDescriptor : EditorDescriptor
    {
        public override void ModifyMetadata(ExtendedMetadata metadata, IEnumerable<Attribute> attributes)
        {
            base.ModifyMetadata(metadata, attributes);
            foreach (var prop in metadata.Properties)
            {
                if (prop.PropertyName == "Title")
                {
                    prop.ShowForEdit = false;
                }
            }
        }
    }