Bachelor, who started this week, will lead Titan's team of eight Trade Sales Executives and Business Development Managers. She reports to Titan parent Saga's Chief Marketing Officer for Travel, Hannah Fisher.
She brings 25 years' travel industry experience across ancillaries, accommodation, tour operating and cruise.
Most recently, she was Director of Sales at Venture Ashore, overseeing B2B trade sales and distribution across the UK and North America. She has also held senior sales roles at HPro Travel, Monarch Travel Group and Affordable Car Hire.
Bachelor said she would use her experience of working with retail agents, consortia and homeworking networks to ensure partners have "what they need to sell Titan's products effectively".
Saga Travel Chief Executive Nigel Blanks said Bachelor brought "exceptional strategic and sales management experience" and would help build on Titan's reputation and share of the escorted tours market.
Andrea Jones has been serving as Titan's acting Head of Trade Sales in the interim to ensure its agent partners continued to receive the full support they need to sell the brand.
Lewis-Riley has since joined Scenic Group as Director of Trade Sales and Partnerships, which he described as "an incredibly exciting new challenge".
Titan said further appointments would be announced in the coming weeks.