Title's chart-topping arrival comes after Trainor earlier led the Billboard Hot 100 singles chart with her introductory hit, "All About That Bass." The tune ruled the Hot 100 for eight consecutive weeks in 2014.
Title's first-week units includes 195,000 in pure album sales, an impressive figure, considering January is traditionally a sleepy month for big new releases. The last album released in January to open with a larger sum was Justin Bieber's Believe: Acoustic, which hit retail on Jan. 29, 2013, and opened with 211,000.
In addition, Title logs the biggest debut for a female pop artist's first full-length album in over five years. The last to start larger was Susan Boyle, who sold 701,000 copies of I Dreamed a Dream in its first week (ending Nov. 29, 2009).
Trainor's entrance is the largest opening for any solo artist's first full-length set in more than three years, since Scotty McCreery's Clear as Day arrived with 197,000 (in the week ending Oct. 9, 2011).
Both Boyle and McCreery had great TV exposure assisting their debuts, as they both competed on talent competition shows before their albums were released. Boyle rose to fame thanks to her star-making turn on Britain's Got Talent, while McCreery won the 2011 season of Fox's American Idol.
As for Trainor, while she wasn't a reality-show competitor, she has had months of major exposure leading up to Title's release. Her smash No. 1 single "All About That Bass" debuted on the Billboard Hot 100 dated July 26, 2014, on its way to an eight-week reign atop the list. In the meantime, Trainor's introductory four-song EP -- also named Title -- was percolating on the Billboard 200 chart. The set debuted and peaked at No. 15 and has sold 171,000 copies.
Trainor followed up the success of "All About That Bass'" with another top five single, the No. 4-peaking (so far) "Lips Are Movin.'" (While both "Bass" and "Lips" are on the full-length Title album, only "Bass" appeared on the EP.)
Lastly, Title is Epic Records' first No. 1 album since the Sept. 25, 2010-dated chart, when Sara Bareilles' Kaleidoscope Heart bowed atop the tally.
If Trainor is No. 1, that means Taylor Swift's rule in the penthouse with 1989 is over -- at least temporarily. 1989 slips 1-2 in its 12th week on the list, after hanging out at No. 1 for nine nonconsecutive weeks. It shifted 131,000 units for the week (down 15 percent).
Kidz Bop Kids warble their way to a No. 3 arrival on the Billboard 200 with Kidz Bop 27, moving 80,000 units. It's the 20th top 10 album for the long-running series, which garnered its first top 10 effort nearly 10 years ago, when Kidz Bop 7 opened at No. 7 on the March 12, 2005-dated chart.
As usual, the new Kidz Bop 27 album features child-friendly covers of contemporary pop hits, like Swift's "Shake It Off" and Trainor's "All About That Bass."
Notably, of Kidz Bop 27's first-week units, just over 77,000 were comprised of pure album sales. That's the largest sales week for a Kidz Bop album in two years. The last Kidz Bop set to post a bigger week was Kidz Bop 23, when it entered at No. 2 with 81,000 copies sold (on the chart dated Feb. 2, 2013).
Ed Sheeran's x slips 2-4 on the Billboard 200 with 77,000 units, up 2 percent. Of x's total for the week, 47 percent of its sum was comprised of pure album sales.
Next up on the Billboard 200, producer Mark Ronson -- powered by his smash No. 1 Hot 100 hit "Uptown Funk!" -- arrives at No. 5 with his album Uptown Special. The set starts with 77,000 units and marks Ronson's first top 40 album. (He previously topped out at No. 81 with 2010's Record Collection, and No. 129 with 2007's Version.)
Uptown Special's chart rank is bolstered by units earned from TEA and SEA, thanks to "Uptown Funk!," featuring Bruno Mars. Sixty-one percent of the set's opening-unit total is driven by TEA and SEA. (The album enters at No. 6 on the Top Album Sales chart, which ranks the week's top selling albums.)
Back on the Billboard 200, Nicki Minaj's The Pinkprint falls 3-6 (54,000 units; down 10 percent) and Sam Smith's In the Lonely Hour descends 4-7 (50,000 units; down 12 percent).
Maroon 5's V zooms back into the top 10, rising 15-8, thanks in part to the success of its single "Sugar." The song's wedding-crasher-themed video went viral last week, helping spur the album to a 138 percent unit gain (to 48,000 for the week). V's album sales were also on the rise, jumping by 158 percent to 19,000 (zipping 27-12 on Top Album Sales).
Hozier's self-titled album moves 6-9 on the Billboard 200 with 42,000 units (down 15 percent), while J. Cole's 2014 Forest Hills Drive closes out the top 10, falling 7-10 with 38,000 units (down 16 percent).